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2466 lines
1.2 MiB
2466 lines
1.2 MiB
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="H01J" definition-exists="true" date-revised="2018-08-01" status="published"><classification-symbol>H01J</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS </text><reference><text>spark-gaps <class-ref scheme="cpc">H01T</class-ref>; arc lamps with consumable electrodes <class-ref scheme="cpc">H05B</class-ref>; particle accelerators <class-ref scheme="cpc">H05H</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> This subclass <u>covers</u> only devices for producing, influencing, or using a flow of electrons or ions, e.g. for controlling, indicating, or switching of electric current, counting electric pulses, producing light or other electromagnetic oscillations, such as X-rays, or for separating or analysing radiation or particles, and having a closed or substantially closed casing containing a chosen gas, vapour, or vacuum, upon the pressure and nature of which the characteristics of the device depend. Light sources using a combination (other than covered by group <class-ref scheme="cpc">H01J61/96</class-ref> of this subclass) of discharge and other kinds of light generation are dealt with in <class-ref scheme="cpc">H05B35/00</class-ref>. </note-paragraph><note-paragraph> In this subclass, groups <class-ref scheme="cpc">H01J1/00</class-ref> - <class-ref scheme="cpc">H01J7/00</class-ref> relate only to: <subnote type="roman"><note-paragraph>details of an unspecified kind of discharge tube or lamp, or</note-paragraph><note-paragraph> details mentioned in a specification as applicable to two or more kinds of tubes or lamps as defined by groups <class-ref scheme="cpc">H01J11/00</class-ref>, <class-ref scheme="cpc">H01J13/00</class-ref>, <class-ref scheme="cpc">H01J15/00</class-ref>, <class-ref scheme="cpc">H01J17/00</class-ref>, <class-ref scheme="cpc">H01J21/00</class-ref>, <class-ref scheme="cpc">H01J25/00</class-ref>, <class-ref scheme="cpc">H01J27/00</class-ref>, <class-ref scheme="cpc">H01J31/00</class-ref>, <class-ref scheme="cpc">H01J33/00</class-ref>, <class-ref scheme="cpc">H01J35/00</class-ref>, <class-ref scheme="cpc">H01J37/00</class-ref>, <class-ref scheme="cpc">H01J40/00</class-ref>, <class-ref scheme="cpc">H01J41/00</class-ref>, <class-ref scheme="cpc">H01J47/00</class-ref>, <class-ref scheme="cpc">H01J49/00</class-ref>, <class-ref scheme="cpc">H01J61/00</class-ref>, <class-ref scheme="cpc">H01J63/00</class-ref> or <class-ref scheme="cpc">H01J65/00</class-ref>, hereinafter called basic kinds. A detail only described with reference to, or clearly only applicable to, tubes or lamps of a single basic kind is classified in the detail group appropriate to tubes or lamps of that basic kind, e.g. <class-ref scheme="cpc">H01J17/04</class-ref>. </note-paragraph></subnote></note-paragraph><note-paragraph> In this subclass, the following term is used with the meaning indicated: <subnote type="bullet"><note-paragraph>"lamp" includes tubes emitting ultra-violet or infra-red light. </note-paragraph></subnote></note-paragraph><note-paragraph>Attention is drawn to the definition of the expression "spark gaps" given in the Note following the title of subclass <class-ref scheme="cpc">H01T</class-ref>.</note-paragraph><note-paragraph> Apparatus or processes specially adapted for the manufacture of electric discharge tubes, discharge lamps, or parts thereof are classified in group <class-ref scheme="cpc">H01J9/00</class-ref>. </note-paragraph></note><note type="warning"><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="H01J1/00" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J1/00" definition-exists="true" ipc-concordant="H01J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps </text><reference><text>details of electron-optical arrangements or of ion traps <class-ref scheme="cpc">H01J3/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J1/02" definition-exists="false" ipc-concordant="H01J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Main electrodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/025" definition-exists="false" ipc-concordant="H01J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hollow cathodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/04" definition-exists="false" ipc-concordant="H01J1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid electrodes, e.g. liquid cathode</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/05" definition-exists="false" ipc-concordant="H01J1/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/06" definition-exists="false" ipc-concordant="H01J1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Containers for liquid-pool electrodes</text></title-part><title-part><text>Arrangement or mounting thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/08" definition-exists="false" ipc-concordant="H01J1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Positioning or moving the cathode spot on the surface of a liquid-pool cathode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/10" definition-exists="false" ipc-concordant="H01J1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling, heating, circulating, filtering, or controlling level of liquid in a liquid-pool electrode</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/12" definition-exists="false" ipc-concordant="H01J1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodes having mercury or liquid alkali metal deposited on the cathode surface during operation of the tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/13" definition-exists="false" ipc-concordant="H01J1/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Solid thermionic cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/135" definition-exists="false" ipc-concordant="H01J1/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/135</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuit arrangements therefor, e.g. for temperature control</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/14" definition-exists="false" ipc-concordant="H01J1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/142" definition-exists="false" ipc-concordant="H01J1/142" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/142</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with alkaline-earth metal oxides, or such oxides used in conjunction with reducing agents, as an emissive material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/144" definition-exists="false" ipc-concordant="H01J1/144" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/144</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with other metal oxides as an emissive material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/146" definition-exists="false" ipc-concordant="H01J1/146" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with metals or alloys as an emissive material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/148" definition-exists="false" ipc-concordant="H01J1/148" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/148</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with compounds having metallic conductive properties, e.g. lanthanum boride, as an emissive material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/15" definition-exists="false" ipc-concordant="H01J1/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodes heated directly by an electric current</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/16" definition-exists="false" ipc-concordant="H01J1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the shape</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/18" definition-exists="false" ipc-concordant="H01J1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supports</text></title-part><title-part><text>Vibration-damping arrangements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/20" definition-exists="false" ipc-concordant="H01J1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodes heated indirectly by an electric current</text></title-part><title-part><text>Cathodes heated by electron or ion bombardment</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/22" definition-exists="true" ipc-concordant="H01J1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J1/22</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Heaters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/24" definition-exists="false" ipc-concordant="H01J1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Insulating layer or body located between heater and emissive material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/26" definition-exists="false" ipc-concordant="H01J1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supports for the emissive material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/28" definition-exists="false" ipc-concordant="H01J1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dispenser-type cathodes, e.g. L-cathode</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/30" definition-exists="false" ipc-concordant="H01J1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold cathodes, e.g. field-emissive cathode</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/304" definition-exists="false" ipc-concordant="H01J1/304" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/304</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Field-emissive cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/3042" definition-exists="false" ipc-concordant="H01J1/304" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/3042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>microengineered, e.g. Spindt-type</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J1/3044" definition-exists="false" ipc-concordant="H01J1/304" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/3044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Point emitters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J1/3046" definition-exists="false" ipc-concordant="H01J1/304" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/3046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Edge emitters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/3048" definition-exists="false" ipc-concordant="H01J1/304" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/3048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distributed particle emitters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/308" definition-exists="false" ipc-concordant="H01J1/308" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/308</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Semiconductor cathodes, e.g. cathodes with PN junction layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/312" definition-exists="true" ipc-concordant="H01J1/312" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J1/312</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>having an electric field perpendicular to the surface, e.g. tunnel-effect cathodes of Metal-Insulator-Metal [MIM] type </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H01J1/304</class-ref> - <class-ref scheme="cpc">H01J1/308</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/316" definition-exists="false" ipc-concordant="H01J1/316" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/316</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having an electric field parallel to the surface, e.g. thin film cathodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/32" definition-exists="true" ipc-concordant="H01J1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J1/32</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Secondary-electron-emitting electrodes </text><reference><text><class-ref scheme="cpc">H01J1/35</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/34" definition-exists="true" ipc-concordant="H01J1/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J1/34</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Photo-emissive cathodes </text><reference><text><class-ref scheme="cpc">H01J1/35</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/35" definition-exists="false" ipc-concordant="H01J1/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/35</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes exhibiting both secondary emission and photo-emission</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/36" definition-exists="false" ipc-concordant="H01J1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Solid anodes</text></title-part><title-part><text>Solid auxiliary anodes for maintaining a discharge</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/38" definition-exists="false" ipc-concordant="H01J1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/40" definition-exists="false" ipc-concordant="H01J1/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>forming part of the envelope of the tube or lamp</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/42" definition-exists="true" ipc-concordant="H01J1/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling of anodes </text><reference><text>cooling rotary anodes <class-ref scheme="cpc">H01J1/44</class-ref></text></reference></title-part><title-part><text>Heating of anodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/44" definition-exists="false" ipc-concordant="H01J1/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotary anodes</text></title-part><title-part><text>Arrangements for rotating anodes</text></title-part><title-part><text>Cooling rotary anodes</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J1/46" definition-exists="true" ipc-concordant="H01J1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control electrodes, e.g. grid </text><reference><text>for igniting arrangements <class-ref scheme="cpc">H01J7/30</class-ref></text></reference></title-part><title-part><text>Auxiliary electrodes </text><reference><text>auxiliary anodes for maintaining a discharge <class-ref scheme="cpc">H01J1/36</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/48" definition-exists="false" ipc-concordant="H01J1/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J1/50" definition-exists="false" ipc-concordant="H01J1/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic means for controlling the discharge</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J1/52" definition-exists="true" ipc-concordant="H01J1/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J1/52</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Screens for shielding</text></title-part><title-part><text>Guides for influencing the discharge</text></title-part><title-part><text>Masks interposed in the electron stream</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J1/53" definition-exists="true" ipc-concordant="H01J1/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/53</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Electrodes intimately associated with a screen on or from which an image or pattern is formed, picked-up, converted, or stored</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J1/54" definition-exists="true" ipc-concordant="H01J1/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/54</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Screens on or from which an image or pattern is formed, picked-up, converted, or stored</text></title-part><title-part><text>Luminescent coatings on vessels</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/56" definition-exists="false" ipc-concordant="H01J1/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/56</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>acting as light valves by shutter operation, e.g. for eidophor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/58" definition-exists="false" ipc-concordant="H01J1/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/58</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>acting by discolouration, e.g. halide screen</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/60" definition-exists="false" ipc-concordant="H01J1/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/60</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Incandescent screens</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/62" definition-exists="false" ipc-concordant="H01J1/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/62</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Luminescent screens</text></title-part><title-part><text>Selection of materials for luminescent coatings on vessels</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/63" definition-exists="false" ipc-concordant="H01J1/63" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J1/63</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>characterised by the luminescent material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/64" definition-exists="false" ipc-concordant="H01J1/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/64</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>characterised by the binder or adhesive for securing the luminescent material to its support</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/66" definition-exists="false" ipc-concordant="H01J1/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J1/66</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Supports for luminescent material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/68" definition-exists="false" ipc-concordant="H01J1/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/68</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>with superimposed luminescent layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/70" definition-exists="false" ipc-concordant="H01J1/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/70</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>with protective, conductive, or reflective layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/72" definition-exists="false" ipc-concordant="H01J1/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/72</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>with luminescent material discontinuously arranged, e.g. in dots or lines</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J1/74" definition-exists="false" ipc-concordant="H01J1/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/74</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>with adjacent dots or lines of different luminescent material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/76" definition-exists="false" ipc-concordant="H01J1/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/76</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>provided with permanent marks or references</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/78" definition-exists="false" ipc-concordant="H01J1/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J1/78</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Photoelectric screens</text></title-part><title-part><text>Charge-storage screens</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J1/88" definition-exists="false" ipc-concordant="H01J1/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/88</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/90" definition-exists="true" ipc-concordant="H01J1/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J1/90</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Insulation between electrodes or supports within the vacuum space</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/92" definition-exists="false" ipc-concordant="H01J1/92" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/92</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mountings for the electrode assembly as a whole</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/94" definition-exists="true" ipc-concordant="H01J1/94" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J1/94</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Mountings for individual electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J1/96" definition-exists="false" ipc-concordant="H01J1/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/96</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spacing members extending to the envelope</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J1/98" definition-exists="false" ipc-concordant="H01J1/98" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J1/98</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>without fixed connection between spacing member and envelope</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J3/00" definition-exists="true" ipc-concordant="H01J3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J3/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J3/02" definition-exists="true" ipc-concordant="H01J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/02</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Electron guns</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/021" definition-exists="false" ipc-concordant="H01J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J3/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electron guns using a field emission, photo emission, or secondary emission electron source</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J3/022" definition-exists="false" ipc-concordant="H01J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J3/022</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>with microengineered cathode, e.g. Spindt-type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/023" definition-exists="false" ipc-concordant="H01J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J3/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electron guns using electron multiplication</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/024" definition-exists="false" ipc-concordant="H01J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J3/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electron guns using thermionic emission of cathode heated by electron or ion bombardment or by irradiation by other energetic beams, e.g. by laser</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/025" definition-exists="false" ipc-concordant="H01J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J3/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electron guns using a discharge in a gas or a vapour as electron source </text><reference><text>gas-filled discharge tubes with gaseous cathodes <class-ref scheme="cpc">H01J15/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/026" definition-exists="false" ipc-concordant="H01J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J3/026</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Eliminating deleterious effects due to thermal effects, electric or magnetic field </text><reference><text><class-ref scheme="cpc">H01J3/021</class-ref> - <class-ref scheme="cpc">H01J3/025</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/027" definition-exists="false" ipc-concordant="H01J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J3/027</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Construction of the gun or parts thereof </text><reference><text><class-ref scheme="cpc">H01J3/021</class-ref> - <class-ref scheme="cpc">H01J3/025</class-ref>, <class-ref scheme="cpc">H01J3/026</class-ref> and <class-ref scheme="cpc">H01J3/028</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/028" definition-exists="false" ipc-concordant="H01J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J3/028</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Replacing parts of the gun; Relative adjustment </text><reference><text><class-ref scheme="cpc">H01J3/021</class-ref> - <class-ref scheme="cpc">H01J3/025</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/029" definition-exists="false" ipc-concordant="H01J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J3/029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Schematic arrangements for beam forming</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J3/04" definition-exists="true" ipc-concordant="H01J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/04</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Ion guns</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J3/06" definition-exists="true" ipc-concordant="H01J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/06</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>two or more guns being arranged in a single vacuum space, e.g. for plural-ray tubes </text><reference><text><class-ref scheme="cpc">H01J3/07</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J3/07" definition-exists="false" ipc-concordant="H01J3/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/07</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Arrangements for controlling convergence of a plurality of beams</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J3/08" definition-exists="true" ipc-concordant="H01J3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/08</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Arrangements for controlling intensity of ray or beam </text><reference><text><class-ref scheme="cpc">H01J3/02</class-ref>, <class-ref scheme="cpc">H01J3/04</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J3/10" definition-exists="true" ipc-concordant="H01J3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/10</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Arrangements for centring ray or beam </text><reference><text><class-ref scheme="cpc">H01J3/02</class-ref>, <class-ref scheme="cpc">H01J3/04</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J3/12" definition-exists="true" ipc-concordant="H01J3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/12</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Arrangements for controlling cross-section of ray or beam</text></title-part><title-part><text>Arrangements for correcting aberration of beam, e.g. due to lenses </text><reference><text><class-ref scheme="cpc">H01J3/02</class-ref>, <class-ref scheme="cpc">H01J3/04</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J3/14" definition-exists="true" ipc-concordant="H01J3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/14</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Arrangements for focusing or reflecting ray or beam </text><reference><text><class-ref scheme="cpc">H01J3/02</class-ref>, <class-ref scheme="cpc">H01J3/04</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/16" definition-exists="false" ipc-concordant="H01J3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/16</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Mirrors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/18" definition-exists="false" ipc-concordant="H01J3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/18</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Electrostatic lenses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/20" definition-exists="false" ipc-concordant="H01J3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/20</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Magnetic lenses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J3/22" definition-exists="false" ipc-concordant="H01J3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/22</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>using electromagnetic means only</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J3/24" definition-exists="false" ipc-concordant="H01J3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/24</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>using permanent magnets only</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J3/26" definition-exists="true" ipc-concordant="H01J3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/26</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Arrangements for deflecting ray or beam</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/28" definition-exists="false" ipc-concordant="H01J3/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/28</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>along one straight line or along two perpendicular straight lines</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J3/30" definition-exists="false" ipc-concordant="H01J3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/30</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>by electric fields only</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J3/32" definition-exists="false" ipc-concordant="H01J3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/32</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>by magnetic fields only</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J3/34" definition-exists="false" ipc-concordant="H01J3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/34</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>along a circle, spiral, or rotating radial line</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J3/36" definition-exists="false" ipc-concordant="H01J3/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/36</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J3/38" definition-exists="false" ipc-concordant="H01J3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J3/38</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J3/40" definition-exists="false" ipc-concordant="H01J3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J3/40</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons</text></title-part><title-part><text>Arrangements for velocity or mass selection </text><CPC-specific-text><reference><text><u>see</u> provisionally also <class-ref scheme="cpc">H01J29/46</class-ref> - <class-ref scheme="cpc">H01J29/84</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J5/00" definition-exists="true" ipc-concordant="H01J5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J5/02" definition-exists="false" ipc-concordant="H01J5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels</text></title-part><title-part><text>Containers</text></title-part><title-part><text>Shields associated therewith</text></title-part><title-part><text>Vacuum locks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/03" definition-exists="false" ipc-concordant="H01J5/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for preventing or mitigating effects of implosion of vessels or containers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/04" definition-exists="true" ipc-concordant="H01J5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J5/04</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Vessels or containers characterised by the material thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/06" definition-exists="false" ipc-concordant="H01J5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels or containers specially adapted for operation at high tension, e.g. by improved potential distribution over surface of vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/08" definition-exists="true" ipc-concordant="H01J5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J5/08</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>provided with coatings on the walls thereof</text></title-part><title-part><text>Selection of materials for the coatings </text><reference><text>luminescent coatings <class-ref scheme="cpc">H01J1/62</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J5/10" definition-exists="false" ipc-concordant="H01J5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>on internal surfaces</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/12" definition-exists="false" ipc-concordant="H01J5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Double-wall vessels or containers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J5/125" definition-exists="false" ipc-concordant="H01J5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a gas tight space between both walls</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/14" definition-exists="false" ipc-concordant="H01J5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dismountable vessels or containers, e.g. for replacing cathode heater</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/16" definition-exists="true" ipc-concordant="H01J5/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J5/16</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Optical or photographic arrangements structurally combined with the vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/18" definition-exists="false" ipc-concordant="H01J5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Windows permeable to X-rays, gamma-rays, or particles</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J5/20" definition-exists="false" ipc-concordant="H01J5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Seals between parts of vessels</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/22" definition-exists="false" ipc-concordant="H01J5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vacuum-tight joints between parts of vessel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J5/24" definition-exists="false" ipc-concordant="H01J5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>between insulating parts of vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J5/26" definition-exists="false" ipc-concordant="H01J5/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>between insulating and conductive parts of vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J5/28" definition-exists="false" ipc-concordant="H01J5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>between conductive parts of vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J5/30" definition-exists="false" ipc-concordant="H01J5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using packing-material, e.g. sealing-liquid or elastic insert</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J5/32" definition-exists="false" ipc-concordant="H01J5/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Seals for leading-in conductors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/34" definition-exists="true" ipc-concordant="H01J5/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for an individual conductor </text><reference><text>pinched-stem seals <class-ref scheme="cpc">H01J5/38</class-ref>; end-disc seals <class-ref scheme="cpc">H01J5/40</class-ref>; annular seals <class-ref scheme="cpc">H01J5/44</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J5/36" definition-exists="false" ipc-concordant="H01J5/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using intermediate part</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/38" definition-exists="false" ipc-concordant="H01J5/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pinched-stem or analogous seals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/40" definition-exists="false" ipc-concordant="H01J5/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J5/40</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>End-disc seals, e.g. flat header</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J5/42" definition-exists="false" ipc-concordant="H01J5/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using intermediate part</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/44" definition-exists="false" ipc-concordant="H01J5/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Annular seals disposed between the ends of the vessel</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J5/46" definition-exists="false" ipc-concordant="H01J5/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Leading-in conductors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J5/48" definition-exists="true" ipc-concordant="H01J5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J5/48</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Means forming part of the tube or lamp for the purpose of supporting it</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J5/50" definition-exists="false" ipc-concordant="H01J5/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J5/50</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Means forming part of the tube or lamps for the purpose of providing electrical connection to it</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/52" definition-exists="false" ipc-concordant="H01J5/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>directly applied to or forming part of the vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J5/54" definition-exists="false" ipc-concordant="H01J5/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>supported by a separate part, e.g. base</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J5/56" definition-exists="false" ipc-concordant="H01J5/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shape of the separate part</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J5/565" definition-exists="false" ipc-concordant="H01J5/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/565</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bases for circular lamps</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J5/58" definition-exists="false" ipc-concordant="H01J5/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for fastening the separate part to the vessel, e.g. by cement</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J5/60" definition-exists="false" ipc-concordant="H01J5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for fastening by mechanical means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J5/62" definition-exists="false" ipc-concordant="H01J5/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J5/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Connection of wires protruding from the vessel to connectors carried by the separate part</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J7/00" definition-exists="true" ipc-concordant="H01J7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J7/02" definition-exists="true" ipc-concordant="H01J7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J7/02</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Selection of substances for gas fillings</text></title-part><title-part><text>Specified operating pressure or temperature</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/04" definition-exists="false" ipc-concordant="H01J7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having one or more carbon compounds as the principal constituent</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/06" definition-exists="false" ipc-concordant="H01J7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having helium, argon, neon, krypton, or xenon as the principal constituent</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/08" definition-exists="false" ipc-concordant="H01J7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a metallic vapour as the principal constituent</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J7/10" definition-exists="false" ipc-concordant="H01J7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>mercury vapour</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J7/12" definition-exists="false" ipc-concordant="H01J7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>vapour of an alkali metal</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J7/14" definition-exists="false" ipc-concordant="H01J7/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for obtaining or maintaining the desired pressure within the vessel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/16" definition-exists="false" ipc-concordant="H01J7/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for permitting pumping during operation of the tube or lamp</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/18" definition-exists="false" ipc-concordant="H01J7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for absorbing or adsorbing gas, e.g. by gettering</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J7/183" definition-exists="false" ipc-concordant="H01J7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Composition or manufacture of getters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J7/186" definition-exists="false" ipc-concordant="H01J7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Getter supports</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/20" definition-exists="false" ipc-concordant="H01J7/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for producing, introducing, or replenishing gas or vapour during operation of the tube or lamp</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/22" definition-exists="false" ipc-concordant="H01J7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubulations therefor, e.g. for exhausting</text></title-part><title-part><text>Closures therefor</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J7/24" definition-exists="true" ipc-concordant="H01J7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J7/24</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Cooling arrangements</text></title-part><title-part><text>Heating arrangements</text></title-part><title-part><text>Means for circulating gas or vapour within the discharge space</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/26" definition-exists="false" ipc-concordant="H01J7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by flow of fluid through passages associated with tube or lamp</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/28" definition-exists="false" ipc-concordant="H01J7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by latent heat or evaporation of cooling liquid</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J7/30" definition-exists="true" ipc-concordant="H01J7/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J7/30</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Igniting arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/32" definition-exists="false" ipc-concordant="H01J7/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having resistive or capacitative igniter</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J7/34" definition-exists="false" ipc-concordant="H01J7/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having resistive igniter only</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/36" definition-exists="false" ipc-concordant="H01J7/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Igniting by movement of a solid electrode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/38" definition-exists="false" ipc-concordant="H01J7/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Igniting by movement of vessel as a whole, e.g. tilting</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/40" definition-exists="false" ipc-concordant="H01J7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Igniting by associated radioactive materials or fillings</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J7/42" definition-exists="false" ipc-concordant="H01J7/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means structurally associated with the tube or lamp for indicating defects or previous use</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J7/44" definition-exists="false" ipc-concordant="H01J7/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One or more circuit elements structurally associated with the tube or lamp</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J7/46" definition-exists="false" ipc-concordant="H01J7/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J7/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structurally associated resonator having distributed inductance and capacitance</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J9/00" definition-exists="true" ipc-concordant="H01J9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J9/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Apparatus or processes specially adapted for the manufacture </text><CPC-specific-text><text>, installation, removal, maintenance</text></CPC-specific-text><text> of electric discharge tubes, discharge lamps, or parts thereof</text></title-part><title-part><text>Recovery of material from discharge tubes or lamps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J9/003" definition-exists="false" ipc-concordant="H01J9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary devices for installing or removing discharge tubes or lamps</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/006" definition-exists="false" ipc-concordant="H01J9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for fluorescent lamps</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J9/02" definition-exists="false" ipc-concordant="H01J9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manufacture of electrodes or electrode systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/022" definition-exists="false" ipc-concordant="H01J9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of cold cathodes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/025" definition-exists="false" ipc-concordant="H01J9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of field emission cathodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/027" definition-exists="false" ipc-concordant="H01J9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of thin film cathodes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/04" definition-exists="false" ipc-concordant="H01J9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of thermionic cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/042" definition-exists="false" ipc-concordant="H01J9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacture, activation of the emissive part</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/045" definition-exists="true" ipc-concordant="H01J9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J9/045</classification-symbol><class-title date-revised="2022-08-01"><title-part><CPC-specific-text><text>Activation of assembled cathode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/047" definition-exists="false" ipc-concordant="H01J9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cathodes having impregnated bodies </text><reference><text><class-ref scheme="cpc">H01J9/045</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/06" definition-exists="false" ipc-concordant="H01J9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Machines therefor</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/08" definition-exists="false" ipc-concordant="H01J9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manufacture of heaters for indirectly-heated cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/10" definition-exists="false" ipc-concordant="H01J9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Machines therefor</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/12" definition-exists="false" ipc-concordant="H01J9/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of photo-emissive cathodes</text></title-part><title-part><text>of secondary-emission electrodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/125" definition-exists="false" ipc-concordant="H01J9/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of secondary emission electrodes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/14" definition-exists="false" ipc-concordant="H01J9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of non-emitting electrodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/142" definition-exists="false" ipc-concordant="H01J9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/142</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of shadow-masks for colour television tubes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/144" definition-exists="false" ipc-concordant="H01J9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/144</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mask treatment related to the process of dot deposition during manufacture of luminescent screen</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/146" definition-exists="false" ipc-concordant="H01J9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Surface treatment, e.g. blackening, coating </text><reference><text><class-ref scheme="cpc">H01J9/144</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/148" definition-exists="false" ipc-concordant="H01J9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/148</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of electron emission flat panels, e.g. gate electrodes, focusing electrodes or anode electrodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/16" definition-exists="false" ipc-concordant="H01J9/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Machines for making wire grids</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/18" definition-exists="false" ipc-concordant="H01J9/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Assembling together the component parts of electrode systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/185" definition-exists="false" ipc-concordant="H01J9/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of flat panel display devices, e.g. by using spacers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J9/20" definition-exists="false" ipc-concordant="H01J9/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored</text></title-part><title-part><text>Applying coatings to the vessel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/205" definition-exists="false" ipc-concordant="H01J9/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Applying optical coatings or shielding coatings to the vessel of flat panel displays, e.g. applying filter layers, electromagnetic interference shielding layers, anti-reflection coatings or anti-glare coatings</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/22" definition-exists="false" ipc-concordant="H01J9/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Applying luminescent coatings</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/221" definition-exists="false" ipc-concordant="H01J9/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/221</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in continuous layers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/222" definition-exists="false" ipc-concordant="H01J9/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>constituted by coated granules emitting light of different colour</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/223" definition-exists="false" ipc-concordant="H01J9/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/223</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by uniformly dispersing of liquid</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/224" definition-exists="false" ipc-concordant="H01J9/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/224</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by precipitation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/225" definition-exists="false" ipc-concordant="H01J9/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by electrostatic or electrophoretic processes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/227" definition-exists="false" ipc-concordant="H01J9/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/227</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with luminescent material discontinuously arranged, e.g. in dots or lines</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/2271" definition-exists="false" ipc-concordant="H01J9/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/2271</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by photographic processes </text><reference><text>final treatment of shadow-mask prior to or after dot deposition <class-ref scheme="cpc">H01J9/144</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J9/2272" definition-exists="false" ipc-concordant="H01J9/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/2272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Devices for carrying out the processes, e.g. light houses</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J9/2273" definition-exists="false" ipc-concordant="H01J9/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/2273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary lenses and filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J9/2274" definition-exists="false" ipc-concordant="H01J9/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/2274</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light sources particularly adapted therefor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/2275" definition-exists="false" ipc-concordant="H01J9/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/2275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including the exposition of a substance responsive to a particular radiation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/2276" definition-exists="false" ipc-concordant="H01J9/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/2276</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Development of latent electrostatic images </text><reference><text><u>per se</u> <class-ref scheme="cpc">G03G15/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/2277" definition-exists="false" ipc-concordant="H01J9/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/2277</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by other processes, e.g. serigraphy, decalcomania</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/2278" definition-exists="false" ipc-concordant="H01J9/227" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/2278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Application of light absorbing material, e.g. between the luminescent areas</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/233" definition-exists="false" ipc-concordant="H01J9/233" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H01J9/233</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Manufacture of photoelectric screens or charge-storage screens</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J9/236" definition-exists="true" ipc-concordant="H01J9/236" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J9/236</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Manufacture of magnetic deflecting devices for cathode-ray tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J9/24" definition-exists="false" ipc-concordant="H01J9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manufacture or joining of vessels, leading-in conductors or bases</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/241" definition-exists="false" ipc-concordant="H01J9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/241</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the vessel being for a flat panel display </text><reference><text><class-ref scheme="cpc">H01J9/261</class-ref> takes precedence; flat discharge lamps <class-ref scheme="cpc">H01J9/248</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/242" definition-exists="false" ipc-concordant="H01J9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spacers between faceplate and backplate</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/244" definition-exists="false" ipc-concordant="H01J9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for cathode ray tubes </text><reference><text><class-ref scheme="cpc">H01J9/241</class-ref>, <class-ref scheme="cpc">H01J9/26</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/245" definition-exists="false" ipc-concordant="H01J9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for gas discharge tubes or lamps </text><reference><text><class-ref scheme="cpc">H01J9/241</class-ref>, <class-ref scheme="cpc">H01J9/26</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/247" definition-exists="false" ipc-concordant="H01J9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for gas-discharge lamps</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/248" definition-exists="false" ipc-concordant="H01J9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/248</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the vessel being flat</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/26" definition-exists="false" ipc-concordant="H01J9/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sealing together parts of vessels</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/261" definition-exists="false" ipc-concordant="H01J9/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the vessel being for a flat panel display </text><reference><text>for flat discharge lamps <class-ref scheme="cpc">H01J9/268</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/263" definition-exists="false" ipc-concordant="H01J9/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for cathode-ray tubes </text><reference><text><class-ref scheme="cpc">H01J9/261</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/265" definition-exists="false" ipc-concordant="H01J9/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for gas-discharge tubes or lamps </text><reference><text><class-ref scheme="cpc">H01J9/261</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/266" definition-exists="false" ipc-concordant="H01J9/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for gas-discharge lamps</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J9/268" definition-exists="false" ipc-concordant="H01J9/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the vessel being flat</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/28" definition-exists="false" ipc-concordant="H01J9/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manufacture of leading-in conductors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/30" definition-exists="false" ipc-concordant="H01J9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manufacture of bases</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/32" definition-exists="false" ipc-concordant="H01J9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sealing leading-in conductors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J9/323" definition-exists="true" ipc-concordant="H01J9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J9/323</classification-symbol><class-title date-revised="2022-08-01"><title-part><CPC-specific-text><text>Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J9/326" definition-exists="false" ipc-concordant="H01J9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/326</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>making pinched-stem or analogous seals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/34" definition-exists="false" ipc-concordant="H01J9/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Joining base to vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/36" definition-exists="false" ipc-concordant="H01J9/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Joining connectors to internal electrode system</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J9/38" definition-exists="false" ipc-concordant="H01J9/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Exhausting, degassing, filling, or cleaning vessels</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/385" definition-exists="false" ipc-concordant="H01J9/385" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/385</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Exhausting vessels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/39" definition-exists="false" ipc-concordant="H01J9/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/39</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Degassing vessels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/395" definition-exists="false" ipc-concordant="H01J9/395" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/395</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Filling vessels</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J9/40" definition-exists="false" ipc-concordant="H01J9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Closing vessels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J9/42" definition-exists="false" ipc-concordant="H01J9/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measurement or testing during manufacture</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J9/44" definition-exists="false" ipc-concordant="H01J9/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Factory adjustment of completed discharge tubes or lamps to comply with desired tolerances</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/445" definition-exists="false" ipc-concordant="H01J9/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Aging of tubes or lamps, e.g. by "spot knocking" </text><reference><text>cathode activation <class-ref scheme="cpc">H01J9/045</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J9/46" definition-exists="false" ipc-concordant="H01J9/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Machines having sequentially arranged operating stations</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/48" definition-exists="false" ipc-concordant="H01J9/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J9/48</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>with automatic transfer of workpieces between operating stations</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J9/50" definition-exists="false" ipc-concordant="H01J9/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Repairing or regenerating used or defective discharge tubes or lamps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J9/505" definition-exists="true" ipc-concordant="H01J9/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J9/505</classification-symbol><class-title date-revised="2022-08-01"><title-part><CPC-specific-text><text>Regeneration of cathodes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J9/52" definition-exists="true" ipc-concordant="H01J9/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J9/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recovery of material from discharge tubes or lamps </text><reference><text><class-ref scheme="cpc">H01J9/50</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J11/00" definition-exists="true" ipc-concordant="H01J11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-02-01" status="published"><classification-symbol>H01J11/00</classification-symbol><class-title date-revised="2023-02-01"><title-part><text>Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP] </text><reference><text>circuits or methods for driving PDPs <class-ref scheme="cpc">G09G3/28</class-ref></text></reference></title-part><title-part><text>Gas-filled discharge tubes without any main electrode inside the vessel</text></title-part><title-part><text>Gas-filled discharge tubes with at least one main electrode outside the vessel</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>When classifying in this group, classification is made in all appropriate places. </note-paragraph><note-paragraph>In this group, the following term is used with the meaning indicated: <subnote type="bullet"><note-paragraph>"main electrode" means any of a sustain electrode, scan electrode or address electrode. </note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J11/10" definition-exists="true" ipc-concordant="H01J11/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>AC-PDPs with at least one main electrode being out of contact with the plasma</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J11/12" definition-exists="false" ipc-concordant="H01J11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with main electrodes provided on both sides of the discharge space</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J11/14" definition-exists="false" ipc-concordant="H01J11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with main electrodes provided only on one side of the discharge space</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J11/16" definition-exists="false" ipc-concordant="H01J11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with main electrodes provided inside or on the side face of the spacers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J11/18" definition-exists="false" ipc-concordant="H01J11/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>containing a plurality of independent closed structures for containing the gas, e.g. plasma tube array [PTA] display panels</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J11/20" definition-exists="false" ipc-concordant="H01J11/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J11/22" definition-exists="true" ipc-concordant="H01J11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes, e.g. special shape, material or configuration</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J11/24" definition-exists="false" ipc-concordant="H01J11/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sustain electrodes or scan electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J11/26" definition-exists="false" ipc-concordant="H01J11/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Address electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J11/28" definition-exists="false" ipc-concordant="H01J11/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Auxiliary electrodes, e.g. priming electrodes or trigger electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J11/30" definition-exists="false" ipc-concordant="H01J11/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Floating electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J11/32" definition-exists="false" ipc-concordant="H01J11/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Disposition of the electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J11/34" definition-exists="true" ipc-concordant="H01J11/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels, containers or parts thereof, e.g. substrates</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J11/36" definition-exists="true" ipc-concordant="H01J11/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spacers, barriers, ribs, partitions or the like</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J11/38" definition-exists="true" ipc-concordant="H01J11/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dielectric or insulating layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J11/40" definition-exists="true" ipc-concordant="H01J11/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Layers for protecting or enhancing the electron emission, e.g. MgO layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J11/42" definition-exists="true" ipc-concordant="H01J11/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fluorescent layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J11/44" definition-exists="true" ipc-concordant="H01J11/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-02-04" status="published"><classification-symbol>H01J11/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical arrangements or shielding arrangements, e.g. filters, black matrices, light reflecting means or electromagnetic shielding means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J11/46" definition-exists="true" ipc-concordant="H01J11/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Connecting or feeding means, e.g. leading-in conductors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J11/48" definition-exists="true" ipc-concordant="H01J11/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sealing, e.g. seals specially adapted for leading-in conductors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J11/50" definition-exists="false" ipc-concordant="H01J11/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Filling, e.g. selection of gas mixture</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J11/52" definition-exists="false" ipc-concordant="H01J11/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for absorbing or adsorbing the gas mixture, e.g. by gettering</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J11/54" definition-exists="true" ipc-concordant="H01J11/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J11/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for exhausting the gas</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J13/00" definition-exists="true" ipc-concordant="H01J13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J13/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J13/02" definition-exists="false" ipc-concordant="H01J13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/04" definition-exists="false" ipc-concordant="H01J13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Main electrodes</text></title-part><title-part><text>Auxiliary anodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J13/06" definition-exists="false" ipc-concordant="H01J13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J13/08" definition-exists="false" ipc-concordant="H01J13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J13/10" definition-exists="false" ipc-concordant="H01J13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Containers for the liquid pool</text></title-part><title-part><text>Arrangements or mounting thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J13/12" definition-exists="false" ipc-concordant="H01J13/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Positioning or moving the cathode spot on the surface of the pool</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J13/14" definition-exists="false" ipc-concordant="H01J13/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling, heating, circulating, filtering, or controlling level of the liquid</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J13/16" definition-exists="true" ipc-concordant="H01J13/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J13/16</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Anodes</text></title-part><title-part><text>Auxiliary anodes for maintaining the discharge</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J13/18" definition-exists="false" ipc-concordant="H01J13/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling or heating of anodes</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/20" definition-exists="true" ipc-concordant="H01J13/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control electrodes, e.g. grid </text><reference><text>for igniting arrangements <class-ref scheme="cpc">H01J13/34</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/22" definition-exists="false" ipc-concordant="H01J13/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Screens, e.g. for preventing or eliminating arcing-back</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/24" definition-exists="false" ipc-concordant="H01J13/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels</text></title-part><title-part><text>Containers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J13/242" definition-exists="false" ipc-concordant="H01J13/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the material</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J13/244" definition-exists="false" ipc-concordant="H01J13/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the shape</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J13/246" definition-exists="false" ipc-concordant="H01J13/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/246</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Treatment of, or coating on interior parts of vessel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J13/248" definition-exists="false" ipc-concordant="H01J13/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/248</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Envelope means outside vessel, i.e. screens, reflectors, filters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/26" definition-exists="false" ipc-concordant="H01J13/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Seals between parts of vessels</text></title-part><title-part><text>Seals for leading-in conductors</text></title-part><title-part><text>Leading-in conductors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J13/263" definition-exists="false" ipc-concordant="H01J13/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Leading-in conductors to the liquid electrode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J13/266" definition-exists="false" ipc-concordant="H01J13/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Leading-in conductors to the anode</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/28" definition-exists="false" ipc-concordant="H01J13/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Selection of substances for gas filling</text></title-part><title-part><text>Means for obtaining the desired pressure within the tube</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J13/30" definition-exists="false" ipc-concordant="H01J13/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for permitting pumping during operation of the tube</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/32" definition-exists="true" ipc-concordant="H01J13/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling arrangements</text></title-part><title-part><text>Heating arrangements </text><reference><text>for cathodes <class-ref scheme="cpc">H01J13/14</class-ref>; for anodes <class-ref scheme="cpc">H01J13/18</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/34" definition-exists="true" ipc-concordant="H01J13/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J13/34</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Igniting arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J13/36" definition-exists="false" ipc-concordant="H01J13/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having resistive or capacitative igniter</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J13/38" definition-exists="false" ipc-concordant="H01J13/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having resistive igniter only</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J13/40" definition-exists="false" ipc-concordant="H01J13/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Igniting by movement of a solid electrode</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J13/405" definition-exists="false" ipc-concordant="H01J13/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interrupting contact with liquid cathode</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J13/42" definition-exists="false" ipc-concordant="H01J13/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Igniting by movement of vessel as a whole, e.g. tilting</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/44" definition-exists="true" ipc-concordant="H01J13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J13/44</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Devices for preventing or eliminating arcing-back</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/46" definition-exists="false" ipc-concordant="H01J13/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One or more circuit elements structurally associated with the tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/48" definition-exists="false" ipc-concordant="H01J13/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J13/50" definition-exists="false" ipc-concordant="H01J13/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes having a single main anode</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/52" definition-exists="false" ipc-concordant="H01J13/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with control by one or more intermediate control electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/54" definition-exists="false" ipc-concordant="H01J13/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with control by igniter, e.g. single-anode ignitron</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J13/56" definition-exists="false" ipc-concordant="H01J13/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes having two or more main anodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J13/58" definition-exists="false" ipc-concordant="H01J13/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J13/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with control by one or more intermediate control electrodes</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J15/00" definition-exists="true" ipc-concordant="H01J15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J15/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Gas-filled discharge tubes with gaseous cathodes, e.g. plasma cathode</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J15/02" definition-exists="false" ipc-concordant="H01J15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J15/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details, e.g. electrode, gas filling, shape of vessel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J15/04" definition-exists="false" ipc-concordant="H01J15/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J15/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J17/00" definition-exists="true" ipc-concordant="H01J17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J17/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Gas-filled discharge tubes with solid cathode </text><reference><text><class-ref scheme="cpc">H01J25/00</class-ref>, <class-ref scheme="cpc">H01J27/00</class-ref>, <class-ref scheme="cpc">H01J31/00</class-ref> - <class-ref scheme="cpc">H01J41/00</class-ref> </text><CPC-specific-text><text>, <class-ref scheme="cpc">H01J11/00</class-ref></text></CPC-specific-text><text> take precedence; gas filled spark gaps <class-ref scheme="cpc">H01T</class-ref>; Marx converters <class-ref scheme="cpc">H02M7/26</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J17/005" definition-exists="false" ipc-concordant="H01J17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted as noise generators </text><reference><text>electronic circuits for generation of noise currents or voltages <class-ref scheme="cpc">H03B29/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J17/02" definition-exists="false" ipc-concordant="H01J17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/04" definition-exists="false" ipc-concordant="H01J17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes</text></title-part><title-part><text>Screens</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/06" definition-exists="false" ipc-concordant="H01J17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J17/063" definition-exists="false" ipc-concordant="H01J17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Indirectly heated cathodes, e.g. by the discharge itself</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J17/066" definition-exists="false" ipc-concordant="H01J17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cold cathodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J17/08" definition-exists="false" ipc-concordant="H01J17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having mercury or liquid alkali metal deposited on the cathode surface during operation of the tube</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/10" definition-exists="false" ipc-concordant="H01J17/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/12" definition-exists="false" ipc-concordant="H01J17/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/14" definition-exists="false" ipc-concordant="H01J17/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic means for controlling the discharge</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/16" definition-exists="false" ipc-concordant="H01J17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels</text></title-part><title-part><text>Containers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/18" definition-exists="false" ipc-concordant="H01J17/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J17/18</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Seals between parts of vessels</text></title-part><title-part><text>Seals for leading-in conductors</text></title-part><title-part><text>Leading-in conductors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/183" definition-exists="false" ipc-concordant="H01J17/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Seals between parts of vessel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/186" definition-exists="false" ipc-concordant="H01J17/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Seals between leading-in conductors and vessel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/20" definition-exists="true" ipc-concordant="H01J17/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J17/20</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Selection of substances for gas fillings</text></title-part><title-part><text>Specified operating pressures or temperatures</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/22" definition-exists="false" ipc-concordant="H01J17/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for obtaining or maintaining the desired pressure within the tube</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/24" definition-exists="false" ipc-concordant="H01J17/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for absorbing or adsorbing gas, e.g. by gettering</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/26" definition-exists="false" ipc-concordant="H01J17/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for producing, introducing, or replenishing gas or vapour during operation of the tube</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/28" definition-exists="false" ipc-concordant="H01J17/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/30" definition-exists="false" ipc-concordant="H01J17/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Igniting arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/32" definition-exists="false" ipc-concordant="H01J17/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Igniting by associated radioactive materials or fillings</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J17/325" definition-exists="false" ipc-concordant="H01J17/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Current stabilising tubes, e.g. curpistors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/34" definition-exists="false" ipc-concordant="H01J17/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One or more circuit elements structurally associated with the tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/36" definition-exists="false" ipc-concordant="H01J17/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J17/38" definition-exists="true" ipc-concordant="H01J17/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J17/38</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Cold-cathode tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/40" definition-exists="true" ipc-concordant="H01J17/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J17/40</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes, voltage-indicator tubes, </text><reference><text>cathode-glow lamps <class-ref scheme="cpc">H01J61/04</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/42" definition-exists="false" ipc-concordant="H01J17/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having one or more probe electrodes, e.g. for potential dividing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/44" definition-exists="false" ipc-concordant="H01J17/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having one or more control electrodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J17/46" definition-exists="false" ipc-concordant="H01J17/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for preventing and then permitting ignition but thereafter having no control</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/48" definition-exists="false" ipc-concordant="H01J17/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/485" definition-exists="false" ipc-concordant="H01J17/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/485</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plasma addressed liquid crystal displays [PALC]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/49" definition-exists="true" ipc-concordant="H01J17/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J17/49</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Display panels, e.g. with crossed electrodes </text><CPC-specific-text><text>, e.g. making use of direct current </text><reference><text>display panels making use of alternating current <class-ref scheme="cpc">H01J11/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J17/491" definition-exists="false" ipc-concordant="H01J17/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/491</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with electrodes arranged side by side and substantially in the same plane, e.g. for displaying alphanumeric characters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J17/492" definition-exists="false" ipc-concordant="H01J17/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/492</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with crossed electrodes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J17/494" definition-exists="false" ipc-concordant="H01J17/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/494</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using sequential transfer of the discharges, e.g. of the self-scan type </text><reference><text>addressing circuits therefor <class-ref scheme="cpc">G09G3/29</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J17/495" definition-exists="false" ipc-concordant="H01J17/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/495</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>display panels using sequential transfer of the discharge along dielectric storage elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J17/497" definition-exists="false" ipc-concordant="H01J17/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/497</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for several colours</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J17/498" definition-exists="false" ipc-concordant="H01J17/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/498</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a gas discharge space and a post acceleration space for electrons</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J17/50" definition-exists="true" ipc-concordant="H01J17/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J17/50</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Thermionic-cathode tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/52" definition-exists="false" ipc-concordant="H01J17/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with one cathode and one anode</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/54" definition-exists="false" ipc-concordant="H01J17/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having one or more control electrodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J17/56" definition-exists="false" ipc-concordant="H01J17/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for preventing and then permitting ignition, but thereafter having no control</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J17/58" definition-exists="false" ipc-concordant="H01J17/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with more than one cathode or anode</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/60" definition-exists="false" ipc-concordant="H01J17/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the discharge paths priming each other in a predetermined sequence, e.g. counting tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J17/62" definition-exists="false" ipc-concordant="H01J17/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with independent discharge paths controlled by intermediate electrodes, e.g. polyphase rectifier</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J17/64" definition-exists="false" ipc-concordant="H01J17/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J17/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes specially designed for switching or modulating in a waveguide, e.g. TR box</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J19/00" definition-exists="true" ipc-concordant="H01J19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of vacuum tubes of the types covered by group <class-ref scheme="cpc">H01J21/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/02" definition-exists="false" ipc-concordant="H01J19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron-emitting electrodes</text></title-part><title-part><text>Cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/04" definition-exists="false" ipc-concordant="H01J19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Thermionic cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J19/06" definition-exists="false" ipc-concordant="H01J19/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J19/062" definition-exists="false" ipc-concordant="H01J19/062" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with alkaline-earth metal oxides, or such oxides used in conjunction with reducing agents, as an emissive material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J19/064" definition-exists="false" ipc-concordant="H01J19/064" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/064</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with other metal oxides as an emissive material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J19/066" definition-exists="false" ipc-concordant="H01J19/066" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with metals or alloys as an emissive material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J19/068" definition-exists="false" ipc-concordant="H01J19/068" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/068</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with compounds having metallic conductive properties, e.g. lanthanum boride, as an emissive material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J19/08" definition-exists="false" ipc-concordant="H01J19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodes heated directly by an electric current</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J19/10" definition-exists="false" ipc-concordant="H01J19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the shape</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J19/12" definition-exists="false" ipc-concordant="H01J19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supports</text></title-part><title-part><text>Vibration-damping arrangements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J19/14" definition-exists="false" ipc-concordant="H01J19/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodes heated indirectly by an electric current</text></title-part><title-part><text>Cathodes heated by electron or ion bombardment</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J19/16" definition-exists="true" ipc-concordant="H01J19/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J19/16</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Heaters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J19/18" definition-exists="false" ipc-concordant="H01J19/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Insulating layer or body located between heater and emissive material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J19/20" definition-exists="false" ipc-concordant="H01J19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supports for the emissive material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J19/22" definition-exists="false" ipc-concordant="H01J19/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dispenser-type cathodes, e.g. L-cathode</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/24" definition-exists="false" ipc-concordant="H01J19/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold cathodes, e.g. field-emissive cathode</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/28" definition-exists="false" ipc-concordant="H01J19/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-electron-emitting electrodes</text></title-part><title-part><text>Screens</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/30" definition-exists="false" ipc-concordant="H01J19/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/32" definition-exists="false" ipc-concordant="H01J19/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J19/34" definition-exists="false" ipc-concordant="H01J19/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>forming part of the envelope</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J19/36" definition-exists="false" ipc-concordant="H01J19/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling of anodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/38" definition-exists="false" ipc-concordant="H01J19/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control electrodes, e.g. grid</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/40" definition-exists="true" ipc-concordant="H01J19/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J19/40</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Screens for shielding</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/42" definition-exists="false" ipc-concordant="H01J19/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/44" definition-exists="true" ipc-concordant="H01J19/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J19/44</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Insulation between electrodes or supports within the vacuum space</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/46" definition-exists="false" ipc-concordant="H01J19/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mountings for the electrode assembly as a whole</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/48" definition-exists="true" ipc-concordant="H01J19/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J19/48</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Mountings for individual electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/50" definition-exists="false" ipc-concordant="H01J19/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spacing members extending to the envelope</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J19/52" definition-exists="false" ipc-concordant="H01J19/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>without fixed connection between spacing member and envelope</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/54" definition-exists="false" ipc-concordant="H01J19/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J19/54</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Vessels</text></title-part><title-part><text>Containers</text></title-part><title-part><text>Shields associated therewith</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/56" definition-exists="false" ipc-concordant="H01J19/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material of the vessel or container</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/57" definition-exists="false" ipc-concordant="H01J19/57" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/57</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>provided with coatings on the walls thereof</text></title-part><title-part><text>Selection of materials for the coatings</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/58" definition-exists="false" ipc-concordant="H01J19/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Seals between parts of vessels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/60" definition-exists="false" ipc-concordant="H01J19/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Seals for leading-in conductors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/62" definition-exists="false" ipc-concordant="H01J19/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Leading-in conductors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/64" definition-exists="true" ipc-concordant="H01J19/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J19/64</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Means forming part of the tube for the purpose supporting it</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/66" definition-exists="true" ipc-concordant="H01J19/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H01J19/66</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Means forming part of the tube for the purpose of providing electrical connection to it </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H01J5/46</class-ref> - <class-ref scheme="cpc">H01J5/62</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/68" definition-exists="false" ipc-concordant="H01J19/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Specified gas introduced into the tube at low pressure, e.g. for reducing or influencing space charge</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/70" definition-exists="false" ipc-concordant="H01J19/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for obtaining or maintaining the vacuum, e.g. by gettering</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/72" definition-exists="false" ipc-concordant="H01J19/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubulations therefor, e.g. for exhausting</text></title-part><title-part><text>Closures therefor</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/74" definition-exists="true" ipc-concordant="H01J19/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling arrangements </text><reference><text>cooling of anodes <class-ref scheme="cpc">H01J19/36</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/76" definition-exists="false" ipc-concordant="H01J19/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/76</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means structurally associated with the tube for indicating defects or previous use</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/78" definition-exists="false" ipc-concordant="H01J19/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One or more circuit elements structurally associated with the tube</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J19/80" definition-exists="false" ipc-concordant="H01J19/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structurally associated resonator having distributed inductance and capacitance</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J19/82" definition-exists="false" ipc-concordant="H01J19/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J19/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J21/00" definition-exists="true" ipc-concordant="H01J21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J21/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Vacuum tubes </text><reference><text><class-ref scheme="cpc">H01J25/00</class-ref>, <class-ref scheme="cpc">H01J31/00</class-ref> - <class-ref scheme="cpc">H01J40/00</class-ref>, <class-ref scheme="cpc">H01J43/00</class-ref>, <class-ref scheme="cpc">H01J47/00</class-ref>, <class-ref scheme="cpc">H01J49/00</class-ref> take precedence; details of vacuum tubes <class-ref scheme="cpc">H01J19/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J21/02" definition-exists="false" ipc-concordant="H01J21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with a single discharge path</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J21/04" definition-exists="false" ipc-concordant="H01J21/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>without control means, i.e. diodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J21/06" definition-exists="false" ipc-concordant="H01J21/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having electrostatic control means only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J21/065" definition-exists="false" ipc-concordant="H01J21/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Devices for short wave tubes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J21/08" definition-exists="false" ipc-concordant="H01J21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with movable electrode or electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J21/10" definition-exists="false" ipc-concordant="H01J21/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with one or more immovable internal control electrodes, e.g. triode, pentode, octode</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J21/105" definition-exists="false" ipc-concordant="H01J21/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J21/105</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>with microengineered cathode and control electrodes, e.g. Spindt-type</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J21/12" definition-exists="false" ipc-concordant="H01J21/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with variable amplification factor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J21/14" definition-exists="false" ipc-concordant="H01J21/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with means for concentrating the electron stream, e.g. beam tetrode</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J21/16" definition-exists="false" ipc-concordant="H01J21/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with external electrostatic control means and with or without internal control electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J21/18" definition-exists="false" ipc-concordant="H01J21/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J21/18</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>having magnetic control means</text></title-part><title-part><text>having both magnetic and electrostatic control means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J21/20" definition-exists="true" ipc-concordant="H01J21/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J21/20</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Tubes with more than one discharge path</text></title-part><title-part><text>Multiple tubes, e.g. double diode, triode-hexode</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J21/22" definition-exists="false" ipc-concordant="H01J21/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with movable electrode or electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J21/24" definition-exists="false" ipc-concordant="H01J21/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with variable amplification factor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J21/26" definition-exists="false" ipc-concordant="H01J21/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means for concentrating the electron stream</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J21/34" definition-exists="true" ipc-concordant="H01J21/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with electrode system arranged or dimensioned so as to eliminate transit-time effect </text><reference><text>with flat electrodes <class-ref scheme="cpc">H01J21/36</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J21/36" definition-exists="false" ipc-concordant="H01J21/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J21/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with flat electrodes, e.g. disc electrode</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J23/00" definition-exists="true" ipc-concordant="H01J23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of transit-time tubes of the types covered by group <class-ref scheme="cpc">H01J25/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J23/005" definition-exists="false" ipc-concordant="H01J23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cooling methods or arrangements </text><reference><text><class-ref scheme="cpc">H01J23/033</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J23/02" definition-exists="true" ipc-concordant="H01J23/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes</text></title-part><title-part><text>Magnetic control means</text></title-part><title-part><text>Screens </text><reference><text>associated with resonator or delay system <class-ref scheme="cpc">H01J23/16</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/027" definition-exists="false" ipc-concordant="H01J23/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Collectors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/0275" definition-exists="false" ipc-concordant="H01J23/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/0275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multistage collectors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/033" definition-exists="false" ipc-concordant="H01J23/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Collector cooling devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/04" definition-exists="false" ipc-concordant="H01J23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/05" definition-exists="false" ipc-concordant="H01J23/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a cylindrical emissive surface, e.g. cathodes for magnetrons</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/06" definition-exists="false" ipc-concordant="H01J23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron or ion guns</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/065" definition-exists="true" ipc-concordant="H01J23/065" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>producing a solid cylindrical beam </text><reference><text><class-ref scheme="cpc">H01J23/075</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/07" definition-exists="true" ipc-concordant="H01J23/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>producing a hollow cylindrical beam </text><reference><text><class-ref scheme="cpc">H01J23/075</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/075" definition-exists="false" ipc-concordant="H01J23/075" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/075</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetron injection guns</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/08" definition-exists="false" ipc-concordant="H01J23/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/083" definition-exists="false" ipc-concordant="H01J23/083" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrostatic focusing arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/087" definition-exists="false" ipc-concordant="H01J23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic focusing arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J23/0873" definition-exists="false" ipc-concordant="H01J23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/0873</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with at least one axial-field reversal along the interaction space, e.g. P.P.M. focusing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J23/0876" definition-exists="false" ipc-concordant="H01J23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/0876</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with arrangements improving the linearity and homogeniety of the axial field, e.g. field straightener</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/09" definition-exists="true" ipc-concordant="H01J23/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J23/09</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Electric systems for directing or deflecting the discharge along a desired path, e.g. E-type </text><reference><text>focusing arrangements <class-ref scheme="cpc">H01J23/08</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/10" definition-exists="true" ipc-concordant="H01J23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnet systems for directing or deflecting the discharge along a desired path, e.g. a spiral path </text><reference><text>magnetic focusing arrangements <class-ref scheme="cpc">H01J23/08</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/11" definition-exists="true" ipc-concordant="H01J23/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for reducing noise </text><reference><text>in electron or ion gun <class-ref scheme="cpc">H01J23/06</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J23/12" definition-exists="false" ipc-concordant="H01J23/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels</text></title-part><title-part><text>Containers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J23/14" definition-exists="false" ipc-concordant="H01J23/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Leading-in arrangements</text></title-part><title-part><text>Seals therefor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/15" definition-exists="false" ipc-concordant="H01J23/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for preventing wave energy leakage structurally associated with tube leading-in arrangements, e.g. filters, chokes, attenuating devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J23/16" definition-exists="false" ipc-concordant="H01J23/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J23/16</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/165" definition-exists="false" ipc-concordant="H01J23/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing processes or apparatus therefore</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/18" definition-exists="false" ipc-concordant="H01J23/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resonators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/20" definition-exists="false" ipc-concordant="H01J23/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cavity resonators</text></title-part><title-part><text>Adjustment or tuning thereof</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J23/207" definition-exists="false" ipc-concordant="H01J23/207" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/207</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tuning of single resonator</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J23/213" definition-exists="false" ipc-concordant="H01J23/213" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/213</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Simultaneous tuning of more than one resonator, e.g. resonant cavities of a magnetron</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/22" definition-exists="false" ipc-concordant="H01J23/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Connections between resonators, e.g. strapping for connecting resonators of a magnetron</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/24" definition-exists="false" ipc-concordant="H01J23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J23/24</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Slow-wave structures </text><CPC-specific-text><text>, e.g. delay systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/26" definition-exists="false" ipc-concordant="H01J23/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Helical slow-wave structures</text></title-part><title-part><text>Adjustment therefor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J23/27" definition-exists="false" ipc-concordant="H01J23/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/27</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Helix-derived slow-wave structures</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/28" definition-exists="false" ipc-concordant="H01J23/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Interdigital slow-wave structures</text></title-part><title-part><text>Adjustment therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/30" definition-exists="false" ipc-concordant="H01J23/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J23/34" definition-exists="false" ipc-concordant="H01J23/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J23/36" definition-exists="false" ipc-concordant="H01J23/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/38" definition-exists="false" ipc-concordant="H01J23/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>to or from the discharge</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/40" definition-exists="false" ipc-concordant="H01J23/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>to or from the interaction circuit</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/42" definition-exists="true" ipc-concordant="H01J23/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J23/42</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>the interaction circuit being a helix or a helix-derived slow-wave structure </text><reference><text><class-ref scheme="cpc">H01J23/44</class-ref> - <class-ref scheme="cpc">H01J23/48</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/44" definition-exists="true" ipc-concordant="H01J23/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rod-type coupling devices </text><reference><text><class-ref scheme="cpc">H01J23/46</class-ref>, <class-ref scheme="cpc">H01J23/48</class-ref>, <class-ref scheme="cpc">H01J23/54</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/46" definition-exists="false" ipc-concordant="H01J23/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Loop coupling devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J23/48" definition-exists="true" ipc-concordant="H01J23/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for linking interaction circuit with coaxial lines</text></title-part><title-part><text>Devices of the coupled helices type </text><reference><text><class-ref scheme="cpc">H01J23/46</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J23/50" definition-exists="true" ipc-concordant="H01J23/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the interaction circuit being a helix or derived from a helix </text><reference><text><class-ref scheme="cpc">H01J23/52</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J23/52" definition-exists="false" ipc-concordant="H01J23/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the coupled helices being disposed coaxially around one another</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J23/54" definition-exists="false" ipc-concordant="H01J23/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J23/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Filtering devices preventing unwanted frequencies or modes to be coupled to, or out of, the interaction circuit</text></title-part><title-part><text>Prevention of high frequency leakage in the environment</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J25/00" definition-exists="true" ipc-concordant="H01J25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J25/00</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons </text><reference><text>details of transit-time tubes <class-ref scheme="cpc">H01J23/00</class-ref>; particle accelerators <class-ref scheme="cpc">H05H</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J25/005" definition-exists="false" ipc-concordant="H01J25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gas-filled transit-time tubes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J25/02" definition-exists="true" ipc-concordant="H01J25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J25/02</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/025" definition-exists="false" ipc-concordant="H01J25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with an electron stream following a helical path</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/04" definition-exists="false" ipc-concordant="H01J25/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes having one or more resonators, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly density modulation, e.g. Heaff tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/06" definition-exists="false" ipc-concordant="H01J25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes having only one resonator, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly velocity modulation, e.g. Lüdi-Klystron</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/08" definition-exists="false" ipc-concordant="H01J25/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with electron stream perpendicular to the axis of the resonator</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/10" definition-exists="false" ipc-concordant="H01J25/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/11" definition-exists="false" ipc-concordant="H01J25/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J25/11</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Extended interaction klystrons</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/12" definition-exists="false" ipc-concordant="H01J25/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with pencil-like electron stream in the axis of the resonators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/14" definition-exists="false" ipc-concordant="H01J25/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with tube-like electron stream coaxial with the axis of the resonators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/16" definition-exists="false" ipc-concordant="H01J25/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with pencil-like electron stream perpendicular to the axis of the resonators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/18" definition-exists="false" ipc-concordant="H01J25/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with radial or disc-like electron stream perpendicular to the axis of the resonators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/20" definition-exists="false" ipc-concordant="H01J25/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having special arrangements in the space between resonators, e.g. resistive-wall amplifier tube, space-charge amplifier tube, velocity-jump tube</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/22" definition-exists="false" ipc-concordant="H01J25/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J25/22</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/24" definition-exists="false" ipc-concordant="H01J25/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the electron stream is in the axis of the resonator or resonators and is pencil-like before reflection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/26" definition-exists="false" ipc-concordant="H01J25/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the electron stream is coaxial with the axis of the resonator or resonators and is tube-like before reflection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/28" definition-exists="false" ipc-concordant="H01J25/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the electron stream is perpendicular to the axis of the resonator or resonators and is pencil-like before reflection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/30" definition-exists="false" ipc-concordant="H01J25/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the electron stream is perpendicular to the axis of the resonator or resonators and is radial or disc-like before reflection</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/32" definition-exists="false" ipc-concordant="H01J25/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with plural reflection, e.g. Coeterier tube</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J25/34" definition-exists="false" ipc-concordant="H01J25/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Travelling-wave tubes</text></title-part><title-part><text>Tubes in which a travelling wave is simulated at spaced gaps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/36" definition-exists="false" ipc-concordant="H01J25/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/38" definition-exists="false" ipc-concordant="H01J25/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the forward travelling wave being utilised</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/40" definition-exists="false" ipc-concordant="H01J25/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the backward travelling wave being utilised</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/42" definition-exists="true" ipc-concordant="H01J25/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and with a magnet system producing an H-field crossing the E-field </text><reference><text>with travelling wave moving completely around the electron space <class-ref scheme="cpc">H01J25/50</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/44" definition-exists="false" ipc-concordant="H01J25/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the forward travelling wave being utilised</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/46" definition-exists="false" ipc-concordant="H01J25/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the backward travelling wave being utilised</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/48" definition-exists="false" ipc-concordant="H01J25/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes in which two electron streams of different velocities interact with one another, e.g. electron-wave tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/49" definition-exists="false" ipc-concordant="H01J25/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/49</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes using the parametric principle, e.g. for parametric amplification</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J25/50" definition-exists="true" ipc-concordant="H01J25/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field </text><reference><text>with travelling wave not moving completely around the electron space <class-ref scheme="cpc">H01J25/42</class-ref>; functioning with plural reflection or with reversed cyclotron action <class-ref scheme="cpc">H01J25/62</class-ref>, <class-ref scheme="cpc">H01J25/64</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/52" definition-exists="false" ipc-concordant="H01J25/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/54" definition-exists="true" ipc-concordant="H01J25/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J25/54</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>having only one cavity or other resonator, e.g. neutrode tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J25/55" definition-exists="false" ipc-concordant="H01J25/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/55</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coaxial cavity magnetrons</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J25/56" definition-exists="false" ipc-concordant="H01J25/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with interdigital arrangements of anodes, e.g. turbator tube</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J25/58" definition-exists="false" ipc-concordant="H01J25/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a number of resonators</text></title-part><title-part><text>having a composite resonator, e.g. a helix</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J25/587" definition-exists="false" ipc-concordant="H01J25/587" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/587</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multi-cavity magnetrons</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J25/593" definition-exists="false" ipc-concordant="H01J25/593" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/593</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rising-sun magnetrons</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/60" definition-exists="false" ipc-concordant="H01J25/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with an electron space having a shape that prevents any electron from moving completely around the cathode or guide electrode</text></title-part><title-part><text>Linear magnetrons</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J25/61" definition-exists="false" ipc-concordant="H01J25/61" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/61</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hybrid tubes, i.e. tubes comprising a klystron section and a travelling-wave section</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J25/62" definition-exists="false" ipc-concordant="H01J25/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Strophotrons, i.e. tubes with H-field crossing the E-field and functioning with plural reflection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J25/64" definition-exists="false" ipc-concordant="H01J25/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Turbine tubes, i.e. tubes with H-field crossing the E-field and functioning with reversed cyclotron action</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J25/66" definition-exists="false" ipc-concordant="H01J25/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with electron stream crossing itself and thereby interacting or interfering with itself</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J25/68" definition-exists="true" ipc-concordant="H01J25/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes specially designed to act as oscillator with positive grid and retarding field, e.g. for Barkhausen-Kurz oscillators </text><reference><text>with secondary emission <class-ref scheme="cpc">H01J25/76</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/70" definition-exists="false" ipc-concordant="H01J25/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with resonator having distributed inductance with capacitance, e.g. Pintsch tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J25/72" definition-exists="true" ipc-concordant="H01J25/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which a standing wave or a considerable part thereof is produced along an electrode, e.g. Clavier tube </text><reference><text>with resonator having distributed inductance and capacitance <class-ref scheme="cpc">H01J25/70</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J25/74" definition-exists="true" ipc-concordant="H01J25/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J25/74</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Tubes specially designed to act as transit-time diode oscillators, e.g. monotrons</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J25/76" definition-exists="false" ipc-concordant="H01J25/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/76</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dynamic electron-multiplier tubes, e.g. Farnsworth multiplier tube, multipactor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J25/78" definition-exists="false" ipc-concordant="H01J25/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J25/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with electron stream modulated by deflection in a resonator</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J27/00" definition-exists="true" ipc-concordant="H01J27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ion beam tubes </text><reference><text><class-ref scheme="cpc">H01J25/00</class-ref>, <class-ref scheme="cpc">H01J33/00</class-ref>, <class-ref scheme="cpc">H01J37/00</class-ref> take precedence; particle accelerators <class-ref scheme="cpc">H05H</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J27/02" definition-exists="true" ipc-concordant="H01J27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J27/02</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Ion sources</text></title-part><title-part><text>Ion guns </text><CPC-specific-text><reference><text>for examination or processing discharge tubes <class-ref scheme="cpc">H01J37/08</class-ref>; ion sources, ion guns for particle spectrometer or separator tubes <class-ref scheme="cpc">H01J49/10</class-ref>; ion propulsion <class-ref scheme="cpc">F03H1/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J27/022" definition-exists="false" ipc-concordant="H01J27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J27/024" definition-exists="false" ipc-concordant="H01J27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Extraction optics, e.g. grids</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J27/026" definition-exists="false" ipc-concordant="H01J27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cluster ion sources</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J27/028" definition-exists="false" ipc-concordant="H01J27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Negative ion sources</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J27/04" definition-exists="true" ipc-concordant="H01J27/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J27/04</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>using reflex discharge, e.g. Penning ion sources </text><CPC-specific-text><reference><text>electron bombardment ion sources <class-ref scheme="cpc">H01J27/08</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J27/06" definition-exists="false" ipc-concordant="H01J27/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>without applied magnetic field</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J27/08" definition-exists="false" ipc-concordant="H01J27/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using arc discharge</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J27/10" definition-exists="false" ipc-concordant="H01J27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H01J27/10</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Duoplasmatrons </text><CPC-specific-text><text>; Duopigatrons</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J27/12" definition-exists="false" ipc-concordant="H01J27/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>provided with an expansion cup</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J27/14" definition-exists="false" ipc-concordant="H01J27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other arc discharge ion sources using an applied magnetic field</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J27/143" definition-exists="false" ipc-concordant="H01J27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hall-effect ion sources with closed electron drift</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J27/146" definition-exists="false" ipc-concordant="H01J27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>End-Hall type ion sources, wherein the magnetic field confines the electrons in a central cylinder</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J27/16" definition-exists="false" ipc-concordant="H01J27/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using high-frequency excitation, e.g. microwave excitation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J27/18" definition-exists="false" ipc-concordant="H01J27/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with an applied axial magnetic field</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J27/20" definition-exists="false" ipc-concordant="H01J27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using particle </text><CPC-specific-text><text>beam</text></CPC-specific-text><text> bombardment, e.g. ionisers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J27/205" definition-exists="false" ipc-concordant="H01J27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with electrons, e.g. electron impact ionisation, electron attachment</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J27/22" definition-exists="false" ipc-concordant="H01J27/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Metal ion sources</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J27/24" definition-exists="false" ipc-concordant="H01J27/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using photo-ionisation, e.g. using laser beam</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J27/26" definition-exists="true" ipc-concordant="H01J27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J27/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using surface ionisation, e.g. field effect ion sources, thermionic ion sources </text><reference><text><class-ref scheme="cpc">H01J27/20</class-ref>, <class-ref scheme="cpc">H01J27/24</class-ref> take precedence</text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J29/00" definition-exists="true" ipc-concordant="H01J29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of cathode-ray tubes or of electron-beam tubes of the types covered by group <class-ref scheme="cpc">H01J31/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J29/003" definition-exists="false" ipc-concordant="H01J29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for eliminating unwanted electromagnetic effects, e.g. demagnetisation arrangements, shielding coils </text><reference><text><class-ref scheme="cpc">H01J29/06</class-ref>, <class-ref scheme="cpc">H01J29/867</class-ref> take precedence; demagnetisation in general <class-ref scheme="cpc">H01F13/00</class-ref>; circuit arrangements therefor <class-ref scheme="cpc">H04N9/29</class-ref>; screening of apparatus against electric or magnetic fields <class-ref scheme="cpc">H05K9/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J29/006" definition-exists="false" ipc-concordant="H01J29/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for eliminating unwanted temperature effects</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J29/02" definition-exists="false" ipc-concordant="H01J29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes</text></title-part><title-part><text>Screens</text></title-part><title-part><text>Mounting, supporting, spacing or insulating thereof</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/021" definition-exists="false" ipc-concordant="H01J29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arrangements for eliminating interferences in the tube </text><reference><text><class-ref scheme="cpc">H01J29/484</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/023" definition-exists="false" ipc-concordant="H01J29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>secondary-electron emitting electrode arrangements </text><reference><text>secondary-emission tubes <class-ref scheme="cpc">H01J43/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/025" definition-exists="false" ipc-concordant="H01J29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting or supporting arrangements for grids </text><reference><text><class-ref scheme="cpc">H01J29/028</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/026" definition-exists="false" ipc-concordant="H01J29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting or supporting arrangements for charge storage screens not deposited on the frontplate</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/028" definition-exists="false" ipc-concordant="H01J29/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting or supporting arrangements for flat panel cathode ray tubes, e.g. spacers particularly relating to electrodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/04" definition-exists="true" ipc-concordant="H01J29/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J29/04</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Cathodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/06" definition-exists="false" ipc-concordant="H01J29/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Screens for shielding</text></title-part><title-part><text>Masks interposed in the electron stream</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/07" definition-exists="false" ipc-concordant="H01J29/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shadow masks for colour television tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/073" definition-exists="false" ipc-concordant="H01J29/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting arrangements associated with shadow masks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/076" definition-exists="false" ipc-concordant="H01J29/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the shape or distribution of beam-passing apertures</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/08" definition-exists="true" ipc-concordant="H01J29/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J29/08</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Electrodes intimately associated with a screen on or from which an image or pattern is formed, picked-up, converted or stored, e.g. backing-plates for storage tubes or collecting secondary electrons</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/085" definition-exists="false" ipc-concordant="H01J29/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Anode plates, e.g. for screens of flat panel displays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/10" definition-exists="false" ipc-concordant="H01J29/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Screens on or from which an image or pattern is formed, picked up, converted or stored</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/12" definition-exists="false" ipc-concordant="H01J29/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>acting as light valves by shutter operation, e.g. for eidophor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/14" definition-exists="false" ipc-concordant="H01J29/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>acting by discoloration, e.g. halide screen</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/16" definition-exists="false" ipc-concordant="H01J29/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Incandescent screens</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/18" definition-exists="false" ipc-concordant="H01J29/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Luminescent screens</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/182" definition-exists="false" ipc-concordant="H01J29/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>acting upon the lighting-up of the luminescent material other than by the composition of the luminescent material, e.g. by infra red or UV radiation, heating or electric fields</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/185" definition-exists="false" ipc-concordant="H01J29/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>measures against halo-phenomena</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/187" definition-exists="false" ipc-concordant="H01J29/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/187</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>screens with more than one luminescent material (as mixtures for the treatment of the screens) </text><reference><text>for several superimposed luminescent layers <class-ref scheme="cpc">H01J29/26</class-ref>; for adjacent dots or lines of different luminescent material <class-ref scheme="cpc">H01J29/32</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/20" definition-exists="true" ipc-concordant="H01J29/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J29/20</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>characterised by the luminescent material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/22" definition-exists="false" ipc-concordant="H01J29/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the binder or adhesive for securing the luminescent material to its support, e.g. vessel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/225" definition-exists="false" ipc-concordant="H01J29/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>photosensitive adhesive</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/24" definition-exists="false" ipc-concordant="H01J29/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supports for luminescent material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/26" definition-exists="false" ipc-concordant="H01J29/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with superimposed luminescent layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/28" definition-exists="false" ipc-concordant="H01J29/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with protective, conductive or reflective layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/30" definition-exists="false" ipc-concordant="H01J29/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with luminescent material discontinuously arranged, e.g. in dots, in lines</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/32" definition-exists="false" ipc-concordant="H01J29/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with adjacent dots or lines of different luminescent material, e.g. for colour television</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J29/322" definition-exists="false" ipc-concordant="H01J29/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/322</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with adjacent dots</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J29/325" definition-exists="false" ipc-concordant="H01J29/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with adjacent lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J29/327" definition-exists="false" ipc-concordant="H01J29/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/327</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Black matrix materials</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/34" definition-exists="false" ipc-concordant="H01J29/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>provided with permanent marks or references</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/36" definition-exists="false" ipc-concordant="H01J29/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Photoelectric screens</text></title-part><title-part><text>Charge-storage screens</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/38" definition-exists="true" ipc-concordant="H01J29/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>not using charge storage, e.g. photo-emissive screen, extended cathode </text><CPC-specific-text><reference><text>electrodes using photo-emission in general <class-ref scheme="cpc">H01J1/34</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/385" definition-exists="true" ipc-concordant="H01J29/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J29/385</classification-symbol><class-title date-revised="2022-08-01"><title-part><CPC-specific-text><text>Photocathodes comprising a layer which modified the wave length of impinging radiation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/39" definition-exists="false" ipc-concordant="H01J29/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J29/39</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Charge-storage screens</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/395" definition-exists="false" ipc-concordant="H01J29/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/395</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>charge-storage grids exhibiting triode effect</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/41" definition-exists="true" ipc-concordant="H01J29/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/41</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using secondary emission, e.g. for supericonoscope </text><CPC-specific-text><reference><text>electrodes using secondary emission in general <class-ref scheme="cpc">H01J1/32</class-ref>; secondary emission tubes <class-ref scheme="cpc">H01J43/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J29/413" definition-exists="false" ipc-concordant="H01J29/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/413</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for writing and reading of charge pattern on opposite sides of the target, e.g. for superorthicon</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H01J29/416" definition-exists="false" ipc-concordant="H01J29/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a matrix of electrical conductors traversing the target</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/43" definition-exists="false" ipc-concordant="H01J29/43" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/43</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using photo-emissive mosaic, e.g. for orthicon, for iconoscope</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J29/435" definition-exists="false" ipc-concordant="H01J29/43" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/435</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a matrix of conductors traversing the target</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/44" definition-exists="true" ipc-concordant="H01J29/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>exhibiting internal electric effects caused by particle radiation, e.g. bombardment-induced conductivity </text><CPC-specific-text><reference><text>particle detectors exhibiting internal electric effects <class-ref scheme="cpc">G01T1/26</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/45" definition-exists="true" ipc-concordant="H01J29/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J29/45</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>exhibiting internal electric effects caused by electromagnetic radiation, e.g. photoconductive screen, photodielectric screen, photovoltaic screen </text><CPC-specific-text><reference><text>photoconductive layers for electrography <class-ref scheme="cpc">G03G5/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J29/451" definition-exists="false" ipc-concordant="H01J29/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/451</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with photosensitive junctions</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H01J29/453" definition-exists="false" ipc-concordant="H01J29/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/453</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided with diode arrays</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="H01J29/455" definition-exists="false" ipc-concordant="H01J29/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>formed on a silicon substrate</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H01J29/456" definition-exists="false" ipc-concordant="H01J29/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/456</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>exhibiting no discontinuities, e.g. consisting of uniform layers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J29/458" definition-exists="false" ipc-concordant="H01J29/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/458</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>pyroelectrical targets; targets for infra-red or ultra-violet or X-ray radiations</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J29/46" definition-exists="true" ipc-concordant="H01J29/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01J29/46</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement </text><CPC-specific-text><reference><text>transit time tubes <class-ref scheme="cpc">H01J23/00</class-ref>, <class-ref scheme="cpc">H01J25/00</class-ref>; X-ray tubes <class-ref scheme="cpc">H01J35/00</class-ref>; beam tubes for examining ions, e.g. electron or ion microscopes, or processing of objects or materials, e.g. electron or ion beam tubes <class-ref scheme="cpc">H01J37/04</class-ref>; electron multipliers <class-ref scheme="cpc">H01J43/04</class-ref>; handling of radiation or particles, e.g. focusing, deviating, not otherwise provided for <class-ref scheme="cpc">G21K1/00</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="note"><note-paragraph><class-ref scheme="cpc">H01J29/48</class-ref> takes precedence over groups <class-ref scheme="cpc">H01J29/52</class-ref> - <class-ref scheme="cpc">H01J29/58</class-ref>.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/462" definition-exists="false" ipc-concordant="H01J29/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/462</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arrangements for interrupting the beam during inoperative periods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/465" definition-exists="false" ipc-concordant="H01J29/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/465</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for simultaneous focalisation and deflection of ray or beam</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/467" definition-exists="false" ipc-concordant="H01J29/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01J29/467</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control electrodes for flat display tubes, e.g. of the type covered by group <class-ref scheme="cpc">H01J31/123</class-ref></text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/48" definition-exists="false" ipc-concordant="H01J29/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron guns</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/481" definition-exists="false" ipc-concordant="H01J29/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/481</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electron guns using field-emission, photo-emission, or secondary-emission electron source</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/482" definition-exists="false" ipc-concordant="H01J29/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/482</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electron guns using electron multiplication</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/484" definition-exists="false" ipc-concordant="H01J29/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/484</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Eliminating deleterious effects due to thermal effects, electrical or magnetic fields; Preventing unwanted emission </text><reference><text><class-ref scheme="cpc">H01J29/481</class-ref> and <class-ref scheme="cpc">H01J29/482</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/485" definition-exists="false" ipc-concordant="H01J29/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/485</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Construction of the gun or of parts thereof </text><reference><text><class-ref scheme="cpc">H01J29/481</class-ref>, <class-ref scheme="cpc">H01J29/482</class-ref>, <class-ref scheme="cpc">H01J29/484</class-ref> and <class-ref scheme="cpc">H01J29/487</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/487" definition-exists="false" ipc-concordant="H01J29/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/487</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Replacing parts of the gun; Relative adjustment of the electrodes </text><reference><text><class-ref scheme="cpc">H01J29/481</class-ref> and <class-ref scheme="cpc">H01J29/482</class-ref> take precedence; vacuum locks <class-ref scheme="cpc">H01J29/865</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/488" definition-exists="false" ipc-concordant="H01J29/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/488</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/50" definition-exists="true" ipc-concordant="H01J29/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J29/50</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>two or more guns in a single vacuum space, e.g. for plural-ray tube </text><reference><text><class-ref scheme="cpc">H01J29/51</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/503" definition-exists="false" ipc-concordant="H01J29/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/503</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Three or more guns, the axes of which lay in a common plane</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/506" definition-exists="false" ipc-concordant="H01J29/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/506</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>guns in delta or circular configuration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/51" definition-exists="false" ipc-concordant="H01J29/51" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/51</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for controlling convergence of a plurality of beams </text><CPC-specific-text><text>by means of electric field only</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/52" definition-exists="true" ipc-concordant="H01J29/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for controlling intensity of ray or beam, e.g. for modulation </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H01J29/467</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/525" definition-exists="false" ipc-concordant="H01J29/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/525</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Digitally controlled systems, e.g. Digisplay</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/54" definition-exists="true" ipc-concordant="H01J29/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for centring ray or beam </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H01J29/467</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/56" definition-exists="true" ipc-concordant="H01J29/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for controlling cross-section of ray or beam</text></title-part><title-part><text>Arrangements for correcting aberration of beam, e.g. due to lenses </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H01J29/467</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/563" definition-exists="false" ipc-concordant="H01J29/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/563</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for controlling cross-section</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/566" definition-exists="false" ipc-concordant="H01J29/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/566</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for correcting aberration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/58" definition-exists="true" ipc-concordant="H01J29/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J29/58</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Arrangements for focusing or reflecting ray or beam</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/585" definition-exists="false" ipc-concordant="H01J29/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/585</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the transit time of the electrons has to be taken into account</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/60" definition-exists="false" ipc-concordant="H01J29/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mirrors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/62" definition-exists="false" ipc-concordant="H01J29/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrostatic lenses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/622" definition-exists="false" ipc-concordant="H01J29/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/622</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>producing fields exhibiting symmetry of revolution</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/624" definition-exists="false" ipc-concordant="H01J29/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/624</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>co-operating with or closely associated to an electron gun</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/626" definition-exists="false" ipc-concordant="H01J29/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/626</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>producing fields exhibiting periodic axial symmetry, e.g. multipolar fields</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/628" definition-exists="false" ipc-concordant="H01J29/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/628</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>co-operating with or closely associated to an electron gun</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/64" definition-exists="false" ipc-concordant="H01J29/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic lenses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/66" definition-exists="false" ipc-concordant="H01J29/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electromagnetic means only</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/68" definition-exists="false" ipc-concordant="H01J29/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using permanent magnets only</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/70" definition-exists="true" ipc-concordant="H01J29/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J29/70</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Arrangements for deflecting ray or beam </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H01J29/467</class-ref>, <class-ref scheme="cpc">H01J29/525</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/701" definition-exists="false" ipc-concordant="H01J29/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/701</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/702" definition-exists="false" ipc-concordant="H01J29/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/702</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Convergence correction arrangements therefor</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/703" definition-exists="false" ipc-concordant="H01J29/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/703</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Static convergence systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/705" definition-exists="false" ipc-concordant="H01J29/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/705</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dynamic convergence systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/706" definition-exists="false" ipc-concordant="H01J29/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/706</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Deviation correction devices, i.e. having the same action on each beam</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/707" definition-exists="false" ipc-concordant="H01J29/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/707</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements intimately associated with parts of the gun and co-operating with external magnetic excitation devices</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/708" definition-exists="false" ipc-concordant="H01J29/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/708</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which the transit time of the electrons has to be taken into account</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/72" definition-exists="false" ipc-concordant="H01J29/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>along one straight line or along two perpendicular straight lines</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/74" definition-exists="false" ipc-concordant="H01J29/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Deflecting by electric fields only</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/76" definition-exists="false" ipc-concordant="H01J29/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/76</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Deflecting by magnetic fields only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/762" definition-exists="false" ipc-concordant="H01J29/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/762</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using saddle coils or printed windings </text><reference><text>coils <u>per se</u> <class-ref scheme="cpc">H01F</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/764" definition-exists="false" ipc-concordant="H01J29/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/764</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using toroidal windings</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/766" definition-exists="false" ipc-concordant="H01J29/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/766</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a combination of saddle coils and toroidal windings</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J29/768" definition-exists="false" ipc-concordant="H01J29/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/768</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using printed windings </text><reference><text>printed windings in general <class-ref scheme="cpc">H01F27/2804</class-ref>; manufacturing printed coils <u>per se</u> <class-ref scheme="cpc">H01F41/04</class-ref>; printed circuits and apparatus or processes for manufacturing printed circuits in general <class-ref scheme="cpc">H05K1/00</class-ref>, e.g. <class-ref scheme="cpc">H05K1/16</class-ref>, and <class-ref scheme="cpc">H05K3/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/78" definition-exists="false" ipc-concordant="H01J29/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>along a circle, spiral or rotating radial line, e.g. for radar display</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/80" definition-exists="true" ipc-concordant="H01J29/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H01J29/701</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/803" definition-exists="false" ipc-concordant="H01J29/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/803</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for post-acceleration or post-deflection, e.g. for colour switching</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/806" definition-exists="false" ipc-concordant="H01J29/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electron lens mosaics, e.g. fly's eye lenses, colour selection lenses</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/81" definition-exists="true" ipc-concordant="H01J29/81" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J29/81</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>using shadow masks</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/82" definition-exists="false" ipc-concordant="H01J29/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/823" definition-exists="false" ipc-concordant="H01J29/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/823</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>around the neck of the tube</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J29/826" definition-exists="false" ipc-concordant="H01J29/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Deflection arrangements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J29/84" definition-exists="true" ipc-concordant="H01J29/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J29/84</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons</text></title-part><title-part><text>Arrangements for velocity or mass selection</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/845" definition-exists="false" ipc-concordant="H01J29/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/845</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of magnetic systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J29/86" definition-exists="false" ipc-concordant="H01J29/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/86</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels</text></title-part><title-part><text>Containers</text></title-part><title-part><text>Vacuum locks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/861" definition-exists="false" ipc-concordant="H01J29/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/861</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vessels or containers characterised by the form or the structure thereof</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/862" definition-exists="false" ipc-concordant="H01J29/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/862</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of flat panel cathode ray tubes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/863" definition-exists="false" ipc-concordant="H01J29/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/863</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vessels or containers characterised by the material thereof</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/864" definition-exists="false" ipc-concordant="H01J29/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/864</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spacers between faceplate and backplate of flat panel cathode ray tubes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/865" definition-exists="false" ipc-concordant="H01J29/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J29/865</classification-symbol><class-title date-revised="2022-08-01"><title-part><CPC-specific-text><text>Vacuum locks</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/866" definition-exists="false" ipc-concordant="H01J29/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Devices for introducing a recording support into the vessel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/867" definition-exists="false" ipc-concordant="H01J29/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/867</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means associated with the outside of the vessel for shielding, e.g. magnetic shields </text><reference><text>screens for shielding inside the vessel <class-ref scheme="cpc">H01J29/06</class-ref>; magnetic shielding in general <class-ref scheme="cpc">H05K9/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/868" definition-exists="false" ipc-concordant="H01J29/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/868</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Screens covering the input or output face of the vessel, e.g. transparent anti-static coatings, X-ray absorbing layers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/87" definition-exists="false" ipc-concordant="H01J29/87" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/87</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for preventing or limiting effects of implosion of vessels or containers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/88" definition-exists="true" ipc-concordant="H01J29/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J29/88</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>provided with coatings on the walls thereof</text></title-part><title-part><text>Selection of materials for the coatings </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H01J29/868</class-ref> and <class-ref scheme="cpc">H01J29/89</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/89" definition-exists="true" ipc-concordant="H01J29/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/89</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical or photographic arrangements structurally combined </text><CPC-specific-text><text>or co-operating</text></CPC-specific-text><text> with the vessel </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H01J29/866</class-ref> and <class-ref scheme="cpc">H01J29/868</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/892" definition-exists="false" ipc-concordant="H01J29/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/892</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using fibre optics</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/894" definition-exists="false" ipc-concordant="H01J29/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/894</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements combined with the vessel for the purpose of image projection on a screen </text><reference><text>projection arrangements for image reproduction, e.g. using eidophor <class-ref scheme="cpc">H04N5/74</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/896" definition-exists="false" ipc-concordant="H01J29/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/896</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Anti-reflection means, e.g. eliminating glare due to ambient light</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J29/898" definition-exists="false" ipc-concordant="H01J29/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/898</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spectral filters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J29/90" definition-exists="false" ipc-concordant="H01J29/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Leading-in arrangements</text></title-part><title-part><text>Seals therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J29/92" definition-exists="false" ipc-concordant="H01J29/92" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J29/92</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Means forming part of the tube for the purpose of providing electrical connection to it</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J29/925" definition-exists="false" ipc-concordant="H01J29/92" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/925</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>High voltage anode feedthrough connectors for display tubes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J29/94" definition-exists="true" ipc-concordant="H01J29/94" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H01J29/94</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Selection of substances for gas fillings</text></title-part><title-part><text>Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering </text><CPC-specific-text><reference><text>exhausting, degassing, gettering of electric discharge tubes in general <class-ref scheme="cpc">H01J9/38</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J29/96" definition-exists="false" ipc-concordant="H01J29/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/96</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One or more circuit elements structurally associated with the tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J29/98" definition-exists="false" ipc-concordant="H01J29/98" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J29/98</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J31/00" definition-exists="true" ipc-concordant="H01J31/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J31/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Cathode ray tubes</text></title-part><title-part><text>Electron beam tubes </text><reference><text><class-ref scheme="cpc">H01J25/00</class-ref>, <class-ref scheme="cpc">H01J33/00</class-ref>, <class-ref scheme="cpc">H01J35/00</class-ref>, <class-ref scheme="cpc">H01J37/00</class-ref> take precedence; details of cathode ray tubes or of electron beam tubes <class-ref scheme="cpc">H01J29/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J31/02" definition-exists="true" ipc-concordant="H01J31/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused </text><CPC-specific-text><reference><text>pulse counting circuits therewith <class-ref scheme="cpc">H03K29/06</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J31/04" definition-exists="false" ipc-concordant="H01J31/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with only one or two output electrodes </text><CPC-specific-text><text>with only two electrically independant groups or electrodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J31/06" definition-exists="false" ipc-concordant="H01J31/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with more than two output electrodes, e.g. for multiple switching or counting</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/065" definition-exists="false" ipc-concordant="H01J31/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for electrography or electrophotography, for transferring a charge pattern through the faceplate </text><reference><text>leading-in arrangements <class-ref scheme="cpc">H01J29/90</class-ref>; Lenard tubes <class-ref scheme="cpc">H01J33/00</class-ref>; electrography or electrophotography <u>per se</u> <class-ref scheme="cpc">G03C</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J31/08" definition-exists="false" ipc-concordant="H01J31/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a screen on or from which an image or pattern is formed, picked up, converted, or stored</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J31/10" definition-exists="false" ipc-concordant="H01J31/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Image or pattern display tubes, i.e. having electrical input and optical output</text></title-part><title-part><text>Flying-spot tubes for scanning purposes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/12" definition-exists="false" ipc-concordant="H01J31/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with luminescent screen</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/121" definition-exists="false" ipc-concordant="H01J31/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>tubes for oscillography </text><reference><text>colour display tubes <class-ref scheme="cpc">H01J31/20</class-ref>; cathode ray oscillography <class-ref scheme="cpc">G01R13/20</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/122" definition-exists="false" ipc-concordant="H01J31/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Direct viewing storage tubes without storage grid </text><reference><text>with storage grid <class-ref scheme="cpc">H01J31/18</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/123" definition-exists="false" ipc-concordant="H01J31/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flat display tubes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J31/124" definition-exists="false" ipc-concordant="H01J31/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/124</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electron beam scanning</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J31/125" definition-exists="false" ipc-concordant="H01J31/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J31/126" definition-exists="false" ipc-concordant="H01J31/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using line sources</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J31/127" definition-exists="false" ipc-concordant="H01J31/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using large area or array sources, i.e. essentially a source for each pixel group</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/128" definition-exists="false" ipc-concordant="H01J31/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/128</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digitally controlled display tubes </text><reference><text><class-ref scheme="cpc">H01J31/123</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/14" definition-exists="true" ipc-concordant="H01J31/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magic-eye or analogous tuning indicators </text><CPC-specific-text><reference><text>mounting of visual indicators in a radio set <class-ref scheme="cpc">H03J1/04</class-ref>; circuits for timing indicators <class-ref scheme="cpc">H03J3/14</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/15" definition-exists="true" ipc-concordant="H01J31/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with ray or beam selectively directed to luminescent anode segments </text><CPC-specific-text><reference><text>printing by application of radiation <class-ref scheme="cpc">B41J2/447</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/16" definition-exists="true" ipc-concordant="H01J31/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with mask carrying a number of selectively displayable signs, e.g. charactron, numeroscope </text><CPC-specific-text><reference><text>tubes with a mask carrying a matrix of openings, a selection of which permits a sign to be displayed <class-ref scheme="cpc">H01J31/128</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/18" definition-exists="true" ipc-concordant="H01J31/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with image written by a ray or beam on a grid-like charge-accumulating screen, and with a ray or beam passing through and influenced by this screen before striking the luminescent screen, e.g. direct-view storage tube </text><CPC-specific-text><reference><text>charge storage grids exhibiting triode effect <class-ref scheme="cpc">H01J29/395</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/20" definition-exists="true" ipc-concordant="H01J31/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J31/20</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>for displaying images or patterns in two or more colours </text><CPC-specific-text><reference><text>circuits for colour television <class-ref scheme="cpc">H04N9/16</class-ref> - <class-ref scheme="cpc">H04N9/28</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/201" definition-exists="false" ipc-concordant="H01J31/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/201</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a colour-selection electrode</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J31/203" definition-exists="false" ipc-concordant="H01J31/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/203</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with more than one electron beam</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J31/205" definition-exists="false" ipc-concordant="H01J31/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with three electron beams in delta configuration</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J31/206" definition-exists="false" ipc-concordant="H01J31/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with three coplanar electron beams</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/208" definition-exists="false" ipc-concordant="H01J31/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using variable penetration depth of the electron beam in the luminescent layer, e.g. penetrons</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/22" definition-exists="false" ipc-concordant="H01J31/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for stereoscopic displays</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/24" definition-exists="true" ipc-concordant="H01J31/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with screen acting as light valve by shutter operation, e.g. eidophor </text><CPC-specific-text><reference><text>projection arrangements for image reproduction, e.g. using eidophor <class-ref scheme="cpc">H04N5/74</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J31/26" definition-exists="true" ipc-concordant="H01J31/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Image pick-up tubes having an input of visible light and electric output </text><reference><text>tubes without defined electron beams and having a light ray scanning photo-emissive screen <class-ref scheme="cpc">H01J40/20</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/265" definition-exists="false" ipc-concordant="H01J31/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with light spot scanning</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/28" definition-exists="false" ipc-concordant="H01J31/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J31/28</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>with electron ray scanning the image screen</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/283" definition-exists="false" ipc-concordant="H01J31/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a target comprising semiconductor junctions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/286" definition-exists="false" ipc-concordant="H01J31/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>correlater tubes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/30" definition-exists="false" ipc-concordant="H01J31/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having regulation of screen potential at anode potential, e.g. iconoscope</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J31/32" definition-exists="false" ipc-concordant="H01J31/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with image amplification section, e.g. image-iconoscope, supericonoscope</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/34" definition-exists="false" ipc-concordant="H01J31/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having regulation of screen potential at cathode potential, e.g. orthicon</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J31/36" definition-exists="false" ipc-concordant="H01J31/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with image amplification section, e.g. image-orthicon</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J31/38" definition-exists="false" ipc-concordant="H01J31/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with photoconductive screen, e.g. vidicon</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/40" definition-exists="false" ipc-concordant="H01J31/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having grid-like image screen through which the electron ray passes and by which the ray is influenced before striking the output electrode, i.e. having "triode action"</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/42" definition-exists="false" ipc-concordant="H01J31/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with image screen generating a composite electron beam which is deflected as a whole past a stationary probe to simulate a scanning effect, e.g. Farnsworth pick-up tube</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/44" definition-exists="false" ipc-concordant="H01J31/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with image amplification section</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/46" definition-exists="true" ipc-concordant="H01J31/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H01J31/46</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Tubes in which electrical output represents both intensity and colour of image </text><CPC-specific-text><reference><text>colour television cameras with only one tube <class-ref scheme="cpc">H04N23/12</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/48" definition-exists="false" ipc-concordant="H01J31/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with amplification of output effected by electron multiplier arrangements within the vacuum space</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J31/49" definition-exists="false" ipc-concordant="H01J31/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/49</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pick-up adapted for an input of electromagnetic radiation other than visible light and having an electric output, e.g. for an input of X-rays, for an input of infra-red radiation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J31/495" definition-exists="false" ipc-concordant="H01J31/495" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/495</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pick-up tubes adapted for an input of sonic, ultrasonic, or mechanical vibrations and having an electric output</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J31/50" definition-exists="false" ipc-concordant="H01J31/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/501" definition-exists="false" ipc-concordant="H01J31/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J31/501</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>with an electrostatic electron optic system </text><reference><text><class-ref scheme="cpc">H01J31/52</class-ref> - <class-ref scheme="cpc">H01J31/56</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/502" definition-exists="false" ipc-concordant="H01J31/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H01J31/502</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>with means to interrupt the beam, e.g. shutter for high speed photography </text><reference><text>circuits using electron-beam shutters <class-ref scheme="cpc">G03B27/725</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/503" definition-exists="false" ipc-concordant="H01J31/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J31/503</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>with an electromagnetic electron-optic system </text><reference><text><class-ref scheme="cpc">H01J31/52</class-ref> - <class-ref scheme="cpc">H01J31/56</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/505" definition-exists="false" ipc-concordant="H01J31/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/505</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>flat tubes, e.g. proximity focusing tubes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/506" definition-exists="false" ipc-concordant="H01J31/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/506</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>tubes using secondary emission effect</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/507" definition-exists="false" ipc-concordant="H01J31/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/507</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a large number of channels, e.g. microchannel plates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/508" definition-exists="false" ipc-concordant="H01J31/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/508</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multistage converters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/52" definition-exists="false" ipc-concordant="H01J31/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having grid-like image screen through which the electron ray or beam passes and by which the ray or beam is influenced before striking the luminescent output screen, i.e. having "triode action"</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/54" definition-exists="false" ipc-concordant="H01J31/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the electron ray or beam is reflected by the image input screen on to the image output screen</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/56" definition-exists="false" ipc-concordant="H01J31/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for converting or amplifying images in two or more colours</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J31/58" definition-exists="true" ipc-concordant="H01J31/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J31/58</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Tubes for storage of image or information pattern or for conversion of definition of television or like images, i.e. having electrical input and electrical output </text><CPC-specific-text><reference><text>electrostatic memories using electron beam tubes <class-ref scheme="cpc">G11C11/23</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/585" definition-exists="false" ipc-concordant="H01J31/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/585</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Monoscopes </text><reference><text><class-ref scheme="cpc">H01J31/60</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/60" definition-exists="true" ipc-concordant="H01J31/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having means for deflecting, either selectively or sequentially, an electron ray on to separate surface elements of the screen </text><reference><text>by circuitry alone <class-ref scheme="cpc">H01J29/08</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J31/62" definition-exists="false" ipc-concordant="H01J31/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with separate reading and writing rays</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J31/64" definition-exists="false" ipc-concordant="H01J31/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>on opposite sides of screen, e.g. for conversion of definition</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/66" definition-exists="false" ipc-concordant="H01J31/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having means for allowing all but selected cross-section elements of a homogeneous electron beam to reach corresponding elements of the screen, e.g. selectron</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J31/68" definition-exists="false" ipc-concordant="H01J31/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J31/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the information pattern represents two or more colours</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J33/00" definition-exists="true" ipc-concordant="H01J33/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J33/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Discharge tubes with provision for emergence of electrons or ions from the vessel </text><reference><CPC-specific-text><text>irradiation devices <class-ref scheme="cpc">G21K</class-ref></text></CPC-specific-text><text> ; particle accelerators <class-ref scheme="cpc">H05H</class-ref></text></reference></title-part><title-part><text>Lenard tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J33/02" definition-exists="true" ipc-concordant="H01J33/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J33/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details </text><CPC-specific-text><reference><text>vessels for operation at high tension <class-ref scheme="cpc">H01J5/06</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J33/04" definition-exists="false" ipc-concordant="H01J33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J33/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Windows</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J35/00" definition-exists="true" ipc-concordant="H01J35/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H01J35/00</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>X-ray tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J35/02" definition-exists="false" ipc-concordant="H01J35/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J35/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J35/025" definition-exists="false" ipc-concordant="H01J35/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J35/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>X-ray tubes with structurally associated circuit elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J35/04" definition-exists="false" ipc-concordant="H01J35/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H01J35/04</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Electrodes </text><CPC-specific-text><text>; Mutual position thereof; Constructional adaptations therefor</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J35/045" definition-exists="false" ipc-concordant="H01J35/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J35/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrodes for controlling the current of the cathode ray, e.g. control grids</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J35/06" definition-exists="true" ipc-concordant="H01J35/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/06</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J35/064" definition-exists="false" ipc-concordant="H01J35/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/064</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Details of the emitter, e.g. material or structure </text><reference><text><class-ref scheme="cpc">H01J35/065</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J35/065" definition-exists="true" ipc-concordant="H01J35/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J35/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Field emission, photo emission or secondary emission cathodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J35/066" definition-exists="false" ipc-concordant="H01J35/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/066</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Details of electron optical components, e.g. cathode cups</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J35/08" definition-exists="true" ipc-concordant="H01J35/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/08</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Anodes</text></title-part><title-part><text>Anti cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J35/10" definition-exists="true" ipc-concordant="H01J35/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J35/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotary anodes</text></title-part><title-part><text>Arrangements for rotating anodes</text></title-part><title-part><text>Cooling rotary anodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J35/101" definition-exists="true" ipc-concordant="H01J35/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/101</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Arrangements for rotating anodes, e.g. supporting means, means for greasing, means for sealing the axle or means for shielding or protecting the driving</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J35/1017" definition-exists="false" ipc-concordant="H01J35/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/1017</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Bearings for rotating anodes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H01J35/1024" definition-exists="false" ipc-concordant="H01J35/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H01J35/1024</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Rolling bearings</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H01J35/103" definition-exists="false" ipc-concordant="H01J35/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H01J35/103</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Magnetic bearings</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="H01J35/104" definition-exists="false" ipc-concordant="H01J35/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H01J35/104</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Fluid bearings</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J35/105" definition-exists="false" ipc-concordant="H01J35/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/105</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Cooling of rotating anodes, e.g. heat emitting layers or structures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J35/106" definition-exists="true" ipc-concordant="H01J35/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Active cooling, e.g. fluid flow, heat pipes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J35/107" definition-exists="false" ipc-concordant="H01J35/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/107</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Cooling of the bearing assemblies</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J35/108" definition-exists="true" ipc-concordant="H01J35/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J35/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Substrates for and bonding of emissive target, e.g. composite structures</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J35/112" definition-exists="false" ipc-concordant="H01J35/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/112</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Non-rotating anodes </text><reference><text><class-ref scheme="cpc">H01J35/12</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J35/116" definition-exists="true" ipc-concordant="H01J35/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/116</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Transmissive anodes </text><reference><text>acting as a window <class-ref scheme="cpc">H01J35/186</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J35/12" definition-exists="true" ipc-concordant="H01J35/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/12</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Cooling non-rotary anodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J35/13" definition-exists="false" ipc-concordant="H01J35/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/13</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Active cooling, e.g. fluid flow, heat pipes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J35/14" definition-exists="true" ipc-concordant="H01J35/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/14</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Arrangements for concentrating, focusing, or directing the cathode ray</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J35/147" definition-exists="false" ipc-concordant="H01J35/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/147</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Spot size control</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J35/153" definition-exists="false" ipc-concordant="H01J35/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/153</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Spot position control</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J35/16" definition-exists="true" ipc-concordant="H01J35/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H01J35/16</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Vessels</text></title-part><title-part><text>Containers</text></title-part><title-part><text>Shields associated therewith</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J35/165" definition-exists="false" ipc-concordant="H01J35/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J35/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>joining connectors to the tube</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J35/18" definition-exists="true" ipc-concordant="H01J35/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Windows</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J35/186" definition-exists="true" ipc-concordant="H01J35/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>H01J35/186</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>used as targets or X-ray converters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J35/20" definition-exists="true" ipc-concordant="H01J35/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H01J35/20</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Selection of substances for gas fillings</text></title-part><title-part><text>Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J35/22" definition-exists="false" ipc-concordant="H01J35/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J35/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially designed for passing a very high current for a very short time, e.g. for flash operation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J35/24" definition-exists="true" ipc-concordant="H01J35/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J35/24</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J35/26" definition-exists="true" ipc-concordant="H01J35/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J35/26</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>by rotation of the anode or anticathode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J35/28" definition-exists="false" ipc-concordant="H01J35/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J35/28</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>by vibration, oscillation, reciprocation, or swash-plate motion of the anode or anticathode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J35/30" definition-exists="false" ipc-concordant="H01J35/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J35/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by deflection of the cathode ray</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J35/305" definition-exists="true" ipc-concordant="H01J35/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J35/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using a rotating X-ray tube in conjunction therewith</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J35/32" definition-exists="true" ipc-concordant="H01J35/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J35/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes wherein the X-rays are produced at or near the end of the tube or a part thereof which tube or part has a small cross-section to facilitate introduction into a small hole or cavity</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J37/00" definition-exists="true" ipc-concordant="H01J37/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J37/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof </text><reference><text><class-ref scheme="cpc">H01J33/00</class-ref>, <class-ref scheme="cpc">H01J40/00</class-ref>, <class-ref scheme="cpc">H01J41/00</class-ref>, <class-ref scheme="cpc">H01J47/00</class-ref>, <class-ref scheme="cpc">H01J49/00</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J37/02" definition-exists="true" ipc-concordant="H01J37/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/023" definition-exists="true" ipc-concordant="H01J37/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for mechanically adjusting components not otherwise provided for </text><reference><text>mechanically adjusting from the outside of electron or ion-optical components <class-ref scheme="cpc">H01J37/067</class-ref>; positioning the object or material <class-ref scheme="cpc">H01J37/20</class-ref>; vacuum locks, means for obtaining or maintaining the desired pressure within the tube <class-ref scheme="cpc">H01J37/18</class-ref>; other manipulating devices <class-ref scheme="cpc">H01L21/48</class-ref>, <class-ref scheme="cpc">G21F</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/026" definition-exists="true" ipc-concordant="H01J37/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for avoiding or neutralising unwanted electrical charges on tube components</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/04" definition-exists="true" ipc-concordant="H01J37/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement </text><CPC-specific-text><reference><text>electron or ion-optical systems for localised treatment of materials <class-ref scheme="cpc">H01J37/3007</class-ref>; discharge control means in gas filled discharge tubes <class-ref scheme="cpc">H01J37/32009</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/045" definition-exists="false" ipc-concordant="H01J37/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Beam blanking or chopping, i.e. arrangements for momentarily interrupting exposure to the discharge</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/05" definition-exists="true" ipc-concordant="H01J37/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron or ion-optical arrangements for separating electrons or ions according to their energy </text><CPC-specific-text><text>or mass</text></CPC-specific-text><reference><text>particle separator tubes <class-ref scheme="cpc">H01J49/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/06" definition-exists="true" ipc-concordant="H01J37/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron sources</text></title-part><title-part><text>Electron guns </text><CPC-specific-text><reference><text>electron sources in general <class-ref scheme="cpc">H01J1/02</class-ref>, <class-ref scheme="cpc">H01J19/02</class-ref>; electron guns in general <class-ref scheme="cpc">H01J3/02</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/061" definition-exists="false" ipc-concordant="H01J37/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electron guns using electron multiplication</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/063" definition-exists="true" ipc-concordant="H01J37/063" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Geometrical arrangement of electrodes for beam-forming</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/065" definition-exists="true" ipc-concordant="H01J37/065" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J37/065</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Construction of guns or parts thereof </text><reference><text><class-ref scheme="cpc">H01J37/067</class-ref> - <class-ref scheme="cpc">H01J37/077</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/067" definition-exists="true" ipc-concordant="H01J37/067" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J37/067</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Replacing parts of guns</text></title-part><title-part><text>Mutual adjustment of electrodes </text><reference><text><class-ref scheme="cpc">H01J37/073</class-ref> - <class-ref scheme="cpc">H01J37/077</class-ref> take precedence; vacuum locks <class-ref scheme="cpc">H01J37/18</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/07" definition-exists="true" ipc-concordant="H01J37/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J37/07</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Eliminating deleterious effects due to thermal effects or electric or magnetic fields </text><reference><text><class-ref scheme="cpc">H01J37/073</class-ref> - <class-ref scheme="cpc">H01J37/077</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/073" definition-exists="false" ipc-concordant="H01J37/073" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/073</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron guns using field emission, photo emission, or secondary emission electron sources</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/075" definition-exists="false" ipc-concordant="H01J37/075" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/075</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron guns using thermionic emission from cathodes heated by particle bombardment or by irradiation, e.g. by laser</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/077" definition-exists="false" ipc-concordant="H01J37/077" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/077</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron guns using discharge in gases or vapours as electron sources</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/08" definition-exists="false" ipc-concordant="H01J37/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ion sources</text></title-part><title-part><text>Ion guns</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/09" definition-exists="false" ipc-concordant="H01J37/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diaphragms</text></title-part><title-part><text>Shields associated with electron or ion-optical arrangements</text></title-part><title-part><text>Compensation of disturbing fields</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/10" definition-exists="true" ipc-concordant="H01J37/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lenses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/12" definition-exists="false" ipc-concordant="H01J37/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electrostatic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/14" definition-exists="false" ipc-concordant="H01J37/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>magnetic</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/141" definition-exists="false" ipc-concordant="H01J37/141" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/141</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electromagnetic lenses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J37/1413" definition-exists="true" ipc-concordant="H01J37/141" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/1413</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for interchanging parts of the lens, e.g. pole pieces, within the tube </text><reference><text>mechanically adjusting electron (ion) optical components <class-ref scheme="cpc">H01J37/15</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J37/1416" definition-exists="false" ipc-concordant="H01J37/141" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>H01J37/1416</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>with superconducting coils</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/143" definition-exists="false" ipc-concordant="H01J37/143" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Permanent magnetic lenses</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/145" definition-exists="false" ipc-concordant="H01J37/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combinations of electrostatic and magnetic lenses</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/147" definition-exists="true" ipc-concordant="H01J37/147" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J37/147</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Arrangements for directing or deflecting the discharge along a desired path </text><reference><CPC-specific-text><text><class-ref scheme="cpc">H01J37/045</class-ref> take precedence;</text></CPC-specific-text><text> lenses <class-ref scheme="cpc">H01J37/10</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/1471" definition-exists="false" ipc-concordant="H01J37/147" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/1471</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for centering, aligning or positioning of ray or beam</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/1472" definition-exists="false" ipc-concordant="H01J37/147" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/1472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Deflecting along given lines</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/1474" definition-exists="false" ipc-concordant="H01J37/147" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/1474</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Scanning means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J37/1475" definition-exists="false" ipc-concordant="H01J37/147" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/1475</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>magnetic</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J37/1477" definition-exists="false" ipc-concordant="H01J37/147" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/1477</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>electrostatic</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/1478" definition-exists="false" ipc-concordant="H01J37/147" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/1478</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Beam tilting means, i.e. for stereoscopy or for beam channelling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/15" definition-exists="true" ipc-concordant="H01J37/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>External mechanical adjustment of electron or ion optical components </text><reference><text><class-ref scheme="cpc">H01J37/067</class-ref>, <class-ref scheme="cpc">H01J37/20</class-ref> take precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/153" definition-exists="false" ipc-concordant="H01J37/153" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/153</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron-optical or ion-optical arrangements for the correction of image defects, e.g. stigmators</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/16" definition-exists="false" ipc-concordant="H01J37/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels</text></title-part><title-part><text>Containers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/165" definition-exists="false" ipc-concordant="H01J37/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means associated with the vessel for preventing the generation of or for shielding unwanted radiation, e.g. X-rays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/18" definition-exists="true" ipc-concordant="H01J37/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J37/18</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Vacuum locks </text><CPC-specific-text><text>; Means for obtaining or maintaining the desired pressure within the vessel </text><reference><text>vacuum locks for electron-beam tubes in general <class-ref scheme="cpc">H01J29/865</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/185" definition-exists="false" ipc-concordant="H01J37/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for transferring objects between different enclosures of different pressure or atmosphere</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/20" definition-exists="true" ipc-concordant="H01J37/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J37/20</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Means for supporting or positioning the objects or the material</text></title-part><title-part><text>Means for adjusting diaphragms or lenses associated with the support </text><CPC-specific-text><reference><text>introducing the objects <class-ref scheme="cpc">H01J37/18</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/21" definition-exists="true" ipc-concordant="H01J37/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/21</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for adjusting the focus </text><CPC-specific-text><reference><text>adjusting the focus while observing the image by photographic or optical means <class-ref scheme="cpc">H01J37/22</class-ref>; means for observing the object or the point of impact on the object in tubes for the localised treatment of materials <class-ref scheme="cpc">H01J37/3005</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/22" definition-exists="true" ipc-concordant="H01J37/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical or photographic arrangements associated with the tube </text><CPC-specific-text><reference><text>using a CRT for the display of the image in a scanning electron microscope <class-ref scheme="cpc">H01J37/28</class-ref>; observing the object or the point of impact on the object in tubes for the localised treatment of materials <class-ref scheme="cpc">H01J37/3007</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/222" definition-exists="true" ipc-concordant="H01J37/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Image processing arrangements associated with the tube </text><reference><text>image data processing or generation, in general <class-ref scheme="cpc">G06T</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/224" definition-exists="false" ipc-concordant="H01J37/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/224</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Luminescent screens or photographic plates for imaging </text><reference><text>photosensitive materials for photographic purposes <class-ref scheme="cpc">G03C</class-ref></text></reference><text>; Apparatus specially adapted therefor, e.g. cameras, TV-cameras, photographic equipment, exposure control; Optical subsystems specially adapted therefor, e.g. microscopes for observing image on luminescent screen</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/226" definition-exists="false" ipc-concordant="H01J37/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical arrangements for illuminating the object; optical arrangements for collecting light from the object</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/228" definition-exists="false" ipc-concordant="H01J37/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>whereby illumination and light collection take place in the same area of the discharge</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/24" definition-exists="false" ipc-concordant="H01J37/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/241" definition-exists="true" ipc-concordant="H01J37/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/241</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>High voltage power supply or regulation circuits </text><reference><text>components <class-ref scheme="cpc">H01J37/248</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/242" definition-exists="true" ipc-concordant="H01J37/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filament heating power supply or regulation circuits </text><reference><text><class-ref scheme="cpc">H01J37/241</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/243" definition-exists="true" ipc-concordant="H01J37/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/243</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Beam current control or regulation circuits </text><reference><text><class-ref scheme="cpc">H01J37/241</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/244" definition-exists="false" ipc-concordant="H01J37/244" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J37/244</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Detectors</text></title-part><title-part><text>Associated components or circuits therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/248" definition-exists="true" ipc-concordant="H01J37/248" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J37/248</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Components associated with high voltage supply </text><CPC-specific-text><reference><text>means for measuring the high voltage <u>per se</u> <class-ref scheme="cpc">G01R15/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J37/252" definition-exists="true" ipc-concordant="H01J37/252" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J37/252</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Tubes for spot-analysing by electron or ion beams</text></title-part><title-part><text>Microanalysers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/256" definition-exists="true" ipc-concordant="H01J37/256" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/256</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using scanning beams</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J37/26" definition-exists="true" ipc-concordant="H01J37/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron or ion microscopes</text></title-part><title-part><text>Electron or ion diffraction tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/261" definition-exists="true" ipc-concordant="H01J37/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/263" definition-exists="false" ipc-concordant="H01J37/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Contrast, resolution or power of penetration</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/265" definition-exists="false" ipc-concordant="H01J37/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling the tube; circuit arrangements adapted to a particular application not otherwise provided, e.g. bright-field-dark-field illumination</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/266" definition-exists="true" ipc-concordant="H01J37/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Measurement of magnetic- or electric fields in the object; Lorentzmicroscopy </text><reference><text>emission microscopes <class-ref scheme="cpc">H01J37/285</class-ref>; reflecting microscopes <class-ref scheme="cpc">H01J37/29</class-ref>; spot analysing <class-ref scheme="cpc">H01J37/252</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/268" definition-exists="false" ipc-concordant="H01J37/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with scanning beams</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/27" definition-exists="false" ipc-concordant="H01J37/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/27</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shadow microscopy</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/28" definition-exists="true" ipc-concordant="H01J37/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J37/28</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>with scanning beams </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H01J37/268</class-ref>, <class-ref scheme="cpc">H01J37/292</class-ref>, <class-ref scheme="cpc">H01J37/2955</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/285" definition-exists="true" ipc-concordant="H01J37/285" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emission microscopes, e.g. field-emission microscopes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/29" definition-exists="false" ipc-concordant="H01J37/29" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/29</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reflection microscopes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/292" definition-exists="false" ipc-concordant="H01J37/29" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/292</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using scanning ray</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/295" definition-exists="true" ipc-concordant="H01J37/295" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/295</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron or ion diffraction tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/2955" definition-exists="false" ipc-concordant="H01J37/295" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/2955</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using scanning ray</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J37/30" definition-exists="false" ipc-concordant="H01J37/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron-beam or ion-beam tubes for localised treatment of objects</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/3002" definition-exists="true" ipc-concordant="H01J37/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3005" definition-exists="false" ipc-concordant="H01J37/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Observing the objects or the point of impact on the object</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3007" definition-exists="true" ipc-concordant="H01J37/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J37/3007</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Electron or ion-optical systems </text><reference><text>electron or ion-optical details <class-ref scheme="cpc">H01J37/06</class-ref> - <class-ref scheme="cpc">H01J37/153</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/301" definition-exists="false" ipc-concordant="H01J37/301" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/301</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements enabling beams to pass between regions of different pressure</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/302" definition-exists="true" ipc-concordant="H01J37/302" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/302</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Controlling tubes by external information, e.g. programme control </text><reference><text><class-ref scheme="cpc">H01J37/304</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3023" definition-exists="false" ipc-concordant="H01J37/302" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Programme control</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3026" definition-exists="false" ipc-concordant="H01J37/302" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Patterning strategy</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/304" definition-exists="false" ipc-concordant="H01J37/304" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/304</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Controlling tubes by information coming from the objects </text><CPC-specific-text><text>or from the beam</text></CPC-specific-text><text>, e.g. correction signals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3045" definition-exists="false" ipc-concordant="H01J37/304" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Object or beam position registration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/305" definition-exists="true" ipc-concordant="H01J37/305" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for casting, melting, evaporating or etching </text><CPC-specific-text><reference><text>methods for casting or melting of metals with electron beam or gas discharges <class-ref scheme="cpc">C22B9/22</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3053" definition-exists="true" ipc-concordant="H01J37/305" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H01J37/3053</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>for evaporating or etching</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3056" definition-exists="true" ipc-concordant="H01J37/305" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3056</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for microworking, e.g. etching of gratings, trimming of electrical components </text><reference><text>trimming of resistors <class-ref scheme="cpc">H01C17/22</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/31" definition-exists="true" ipc-concordant="H01J37/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/31</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for cutting or drilling </text><CPC-specific-text><reference><text>methods for cutting or drilling metals with electron beams <class-ref scheme="cpc">B23K15/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/315" definition-exists="true" ipc-concordant="H01J37/315" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/315</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for welding </text><CPC-specific-text><reference><text>methods for welding metals with electron beams <class-ref scheme="cpc">B23K15/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/317" definition-exists="true" ipc-concordant="H01J37/317" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/317</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for changing properties of the objects or for applying thin layers thereon, e.g. for ion implantation </text><reference><text><class-ref scheme="cpc">H01J37/36</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3171" definition-exists="true" ipc-concordant="H01J37/317" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3171</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for ion implantation </text><reference><text>plasma immersion ion implantation <class-ref scheme="cpc">H01J37/32412</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3172" definition-exists="false" ipc-concordant="H01J37/317" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3172</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Maskless patterned ion implantation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3174" definition-exists="true" ipc-concordant="H01J37/317" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3174</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Particle-beam lithography, e.g. electron beam lithography</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3175" definition-exists="false" ipc-concordant="H01J37/317" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3175</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Projection methods, i.e. transfer substantially complete pattern to substrate</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3177" definition-exists="false" ipc-concordant="H01J37/317" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3177</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-beam, e.g. fly's eye, comb probe</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3178" definition-exists="false" ipc-concordant="H01J37/317" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3178</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for applying thin layers on objects</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J37/32" definition-exists="true" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J37/32</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Gas-filled discharge tubes </text><reference><text>heating by discharge <class-ref scheme="cpc">H05B</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/32009" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources </text><reference><text>plasma generation in general <class-ref scheme="cpc">H05H1/24</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32018" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Glow discharge</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32027" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>DC powered</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32036" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>AC powered</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32045" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits specially adapted for controlling the glow discharge</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32055" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arc discharge</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32064" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits specially adapted for controlling the arc discharge </text><reference><text>for plasma torches <class-ref scheme="cpc">H01H1/36</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32073" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Corona discharge</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32082" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-10-01" status="published"><classification-symbol>H01J37/32082</classification-symbol><class-title date-revised="2015-10-01"><title-part><CPC-specific-text><text>Radio frequency generated discharge </text><reference><text><class-ref scheme="cpc">H01J37/32357</class-ref>, <class-ref scheme="cpc">H01J37/32366</class-ref>, <class-ref scheme="cpc">H01J37/32394</class-ref> and <class-ref scheme="cpc">H01J37/32403</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32091" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the radio frequency energy being capacitively coupled to the plasma</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/321" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/321</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the radio frequency energy being inductively coupled to the plasma</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/3211" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3211</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Antennas, e.g. particular shapes of coils</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32119" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32119</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Windows</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32128" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32128</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using particular waveforms, e.g. polarised waves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32137" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32137</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlling of the discharge by modulation of energy</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32146" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Amplitude modulation, includes pulsing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32155" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32155</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Frequency modulation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J37/32165" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plural frequencies</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32174" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32174</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits specially adapted for controlling the RF discharge</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32183" definition-exists="true" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J37/32183</classification-symbol><class-title date-revised="2022-08-01"><title-part><CPC-specific-text><text>Matching circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32192" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-10-01" status="published"><classification-symbol>H01J37/32192</classification-symbol><class-title date-revised="2015-10-01"><title-part><CPC-specific-text><text>Microwave generated discharge </text><reference><text><class-ref scheme="cpc">H01J37/32357</class-ref>, <class-ref scheme="cpc">H01J37/32366</class-ref>, <class-ref scheme="cpc">H01J37/32394</class-ref>, <class-ref scheme="cpc">H01J37/32403</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32201" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32201</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Generating means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32211" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32211</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for coupling power to the plasma</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/3222" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Antennas</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32229" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32229</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Waveguides</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32238" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32238</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Windows</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32247" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Resonators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J37/32256" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32256</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tuning means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32266" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for controlling power transmitted to the plasma</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32275" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Microwave reflectors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32284" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for controlling or selecting resonance mode</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32293" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32293</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using particular waveforms, e.g. polarised waves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32302" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plural frequencies</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32311" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32311</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits specially adapted for controlling the microwave discharge</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32321" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-10-01" status="published"><classification-symbol>H01J37/32321</classification-symbol><class-title date-revised="2015-10-01"><title-part><CPC-specific-text><text>Discharge generated by other radiation </text><reference><text><class-ref scheme="cpc">H01J37/32055</class-ref>, <class-ref scheme="cpc">H01J37/32073</class-ref>, <class-ref scheme="cpc">H01J37/32082</class-ref>, <class-ref scheme="cpc">H01J37/32192</class-ref>, <class-ref scheme="cpc">H01J37/32348</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3233" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3233</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using charged particles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32339" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32339</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electromagnetic radiation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32348" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32348</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dielectric barrier discharge</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32357" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H01J37/32357</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Generation remote from the workpiece, e.g. down-stream</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32366" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32366</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Localised processing</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32376" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32376</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Scanning across large workpieces</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32385" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32385</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Treating the edge of the workpieces</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32394" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32394</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Treating interior parts of workpieces</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32403" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H01J37/32403</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Treating multiple sides of workpieces, e.g. 3D workpieces</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32412" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32412</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plasma immersion ion implantation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32422" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangement for selecting ions or species in the plasma</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/32431" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32431</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional details of the reactor</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3244" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gas supply means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32449" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32449</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gas control, e.g. control of the gas flow</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32458" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32458</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vessel</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32467" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32467</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Material</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32477" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32477</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the means for protecting vessels or internal parts, e.g. coatings</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32486" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32486</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for reducing recombination coefficient</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32495" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32495</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for protecting the vessel against plasma</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32504" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32504</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for preventing sputtering of the vessel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32513" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32513</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sealing means, e.g. sealing between different parts of the vessel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32522" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32522</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Temperature</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32532" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32532</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrodes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32541" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32541</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shape</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3255" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Material</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32559" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32559</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection means, e.g. coatings</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32568" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32568</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Relative arrangement or disposition of electrodes; moving means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32577" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32577</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrical connecting means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32587" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32587</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Triode systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32596" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32596</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hollow cathodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32605" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Removable or replaceable electrodes or electrode systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32614" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32614</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Consumable cathodes for arc discharge</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32623" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32623</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanical discharge control means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32633" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32633</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Baffles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32642" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32642</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Focus rings</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32651" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32651</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shields, e.g. dark space shields, Faraday shields</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3266" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Magnetic control means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32669" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32669</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Particular magnets or magnet arrangements for controlling the discharge</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32678" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32678</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electron cyclotron resonance</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32688" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32688</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-cusp fields</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32697" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32697</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrostatic control</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32706" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32706</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polarising the substrate</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32715" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32715</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Workpiece holder</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32724" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32724</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Temperature</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32733" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32733</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for moving the material to be treated</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32743" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32743</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for introducing the material into processing chamber</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32752" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32752</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for moving the material across the discharge</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32761" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32761</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Continuous moving</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J37/3277" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3277</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of continuous material</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J37/32779" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32779</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of batches of workpieces</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32788" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32788</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for extracting the material from the process chamber</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32798" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32798</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Further details of plasma apparatus not provided for in groups <class-ref scheme="cpc">H01J37/3244</class-ref> - <class-ref scheme="cpc">H01J37/32788</class-ref>; special provisions for cleaning or maintenance of the apparatus</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32807" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32807</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Construction (includes replacing parts of the apparatus)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32816" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pressure</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32825" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Working under atmospheric pressure or higher</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/32862" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32862</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text><u>In situ</u> cleaning of vessels and/or internal parts</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3288" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Maintenance</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32926" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32926</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Software, data control or modelling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/32935" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32935</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Monitoring and controlling tubes by information coming from the object and/or discharge</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32944" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32944</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arc detection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32954" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32954</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electron temperature measurement</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32963" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32963</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>End-point detection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/32972" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/32972</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spectral analysis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3299" definition-exists="false" ipc-concordant="H01J37/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3299</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Feedback systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/34" definition-exists="true" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J37/34</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>operating with cathodic sputtering </text><reference><text><class-ref scheme="cpc">H01J37/36</class-ref> takes precedence </text><CPC-specific-text><text>; methods of cathodic sputtering <class-ref scheme="cpc">C23C14/34</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3402" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3402</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using supplementary magnetic fields</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3405" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Magnetron sputtering</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/342" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/342</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hollow targets</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/3423" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shape</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/3426" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Material</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/3432" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3432</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Target-material dispenser</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3435" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3435</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Target holders (includes backing plates and endblocks)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3438" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3438</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrodes other than cathode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3441" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3441</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dark space shields</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3444" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3444</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Associated circuits</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3447" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3447</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Collimators, shutters, apertures</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J37/3455" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Movable magnets</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3461" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3461</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for shaping the magnetic field, e.g. magnetic shunts</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3464" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3464</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operating strategies</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3467" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3467</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pulsed operation, e.g. HIPIMS</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/347" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/347</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Thickness uniformity of coated layers or desired profile of target erosion</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3473" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3473</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Composition uniformity or desired gradient</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3476" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3476</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Testing and control</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3479" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3479</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detecting exhaustion of target material</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3482" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3482</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detecting or avoiding eroding through</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3485" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3485</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for avoiding target poisoning</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J37/3488" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3488</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional details of particle beam apparatus not otherwise provided for, e.g. arrangement, mounting, housing, environment; special provisions for cleaning or maintenance of the apparatus</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3491" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3491</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing of targets</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3494" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3494</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adaptation to extreme pressure conditions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J37/3497" definition-exists="false" ipc-concordant="H01J37/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/3497</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Temperature of target</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J37/36" definition-exists="true" ipc-concordant="H01J37/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J37/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for cleaning surfaces while plating with ions of materials introduced into the discharge, e.g. introduced by evaporation </text><CPC-specific-text><reference><text>condensing of electrically charged vapour onto a surface for covering materials with metals <class-ref scheme="cpc">C23C14/32</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J40/00" definition-exists="true" ipc-concordant="H01J40/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J40/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Photoelectric discharge tubes not involving the ionisation of a gas </text><reference><text><class-ref scheme="cpc">H01J49/00</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J40/02" definition-exists="false" ipc-concordant="H01J40/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J40/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J40/04" definition-exists="false" ipc-concordant="H01J40/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J40/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J40/06" definition-exists="false" ipc-concordant="H01J40/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J40/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Photo-emissive cathodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J40/08" definition-exists="false" ipc-concordant="H01J40/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J40/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic means for controlling discharge</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J40/10" definition-exists="false" ipc-concordant="H01J40/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J40/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Selection of substances for gas fillings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J40/12" definition-exists="false" ipc-concordant="H01J40/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J40/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One or more circuit elements structurally associated with the tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J40/14" definition-exists="false" ipc-concordant="H01J40/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J40/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J40/16" definition-exists="true" ipc-concordant="H01J40/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J40/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having photo- emissive cathode, e.g. alkaline photoelectric cell </text><reference><text>operating with secondary emission <class-ref scheme="cpc">H01J43/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J40/18" definition-exists="true" ipc-concordant="H01J40/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J40/18</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>with luminescent coatings for influencing the sensitivity of the tube, e.g. by converting the input wavelength</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J40/20" definition-exists="false" ipc-concordant="H01J40/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J40/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein a light-ray scans a photo-emissive screen</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J41/00" definition-exists="true" ipc-concordant="H01J41/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J41/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Discharge tubes for measuring pressure of introduced gas </text><CPC-specific-text><text>or for detecting presence of gas</text></CPC-specific-text></title-part><title-part><text>Discharge tubes for evacuation by diffusion of ions</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J41/02" definition-exists="false" ipc-concordant="H01J41/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J41/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Discharge tubes for measuring pressure of introduced gas </text><CPC-specific-text><text>or for detecting presence of gas</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J41/04" definition-exists="false" ipc-concordant="H01J41/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J41/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with ionisation by means of thermionic cathodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J41/06" definition-exists="false" ipc-concordant="H01J41/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J41/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with ionisation by means of cold cathodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J41/08" definition-exists="false" ipc-concordant="H01J41/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J41/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with ionisation by means of radioactive substances, e.g. alphatrons</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J41/10" definition-exists="false" ipc-concordant="H01J41/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>H01J41/10</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>of particle spectrometer type </text><reference><text>particle spectrometers <u>per se</u> <class-ref scheme="cpc">H01J49/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J41/12" definition-exists="false" ipc-concordant="H01J41/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J41/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J41/14" definition-exists="false" ipc-concordant="H01J41/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J41/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with ionisation by means of thermionic cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J41/16" definition-exists="false" ipc-concordant="H01J41/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J41/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using gettering substances</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J41/18" definition-exists="false" ipc-concordant="H01J41/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J41/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with ionisation by means of cold cathodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J41/20" definition-exists="false" ipc-concordant="H01J41/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J41/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using gettering substances</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J43/00" definition-exists="true" ipc-concordant="H01J43/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J43/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Secondary-emission tubes</text></title-part><title-part><text>Electron-multiplier tubes </text><reference><text>dynamic electron-multiplier tubes <class-ref scheme="cpc">H01J25/76</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J43/02" definition-exists="false" ipc-concordant="H01J43/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes in which one or a few electrodes are secondary-electron emitting electrodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J43/025" definition-exists="false" ipc-concordant="H01J43/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits therefor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J43/04" definition-exists="false" ipc-concordant="H01J43/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron multipliers </text><CPC-specific-text><reference><text>if forming part of electron gun <class-ref scheme="cpc">H01J3/023</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J43/045" definition-exists="false" ipc-concordant="H01J43/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Position sensitive electron multipliers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J43/06" definition-exists="false" ipc-concordant="H01J43/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrode arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J43/08" definition-exists="false" ipc-concordant="H01J43/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J43/08</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Cathode arrangements </text><reference><text>construction of photo cathodes <class-ref scheme="cpc">H01J40/06</class-ref>, <class-ref scheme="cpc">H01J40/16</class-ref>, <class-ref scheme="cpc">H01J47/00</class-ref>, <class-ref scheme="cpc">H01J49/08</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J43/10" definition-exists="false" ipc-concordant="H01J43/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J43/10</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Dynodes </text><reference><text><class-ref scheme="cpc">H01J43/24</class-ref>, <class-ref scheme="cpc">H01J43/26</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J43/12" definition-exists="false" ipc-concordant="H01J43/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anode arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J43/14" definition-exists="false" ipc-concordant="H01J43/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of electron beam by magnetic field</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J43/16" definition-exists="false" ipc-concordant="H01J43/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrode arrangements using essentially one dynode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J43/18" definition-exists="false" ipc-concordant="H01J43/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrode arrangements using essentially more than one dynode</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J43/20" definition-exists="false" ipc-concordant="H01J43/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dynodes consisting of sheet material, e.g. plane, bent</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J43/22" definition-exists="false" ipc-concordant="H01J43/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dynodes consisting of electron-permeable material, e.g. foil, grid, tube, venetian blind</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J43/24" definition-exists="false" ipc-concordant="H01J43/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dynodes having potential gradient along their surfaces</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J43/243" definition-exists="false" ipc-concordant="H01J43/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/243</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dynodes consisting of a piling-up of channel-type dynode plates</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J43/246" definition-exists="false" ipc-concordant="H01J43/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J43/246</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Microchannel plates [MCP] </text><reference><text>image amplification tubes using MCP <class-ref scheme="cpc">H01J31/507</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J43/28" definition-exists="false" ipc-concordant="H01J43/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J43/28</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Vessels </text><CPC-specific-text><text>, e.g. wall of the tube</text></CPC-specific-text></title-part><title-part><text>Windows</text></title-part><title-part><text>Screens</text></title-part><title-part><text>Suppressing undesired discharges or currents</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J43/30" definition-exists="false" ipc-concordant="H01J43/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J43/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J45/00" definition-exists="true" ipc-concordant="H01J45/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J45/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Discharge tubes functioning as thermionic generators </text><CPC-specific-text><reference><text>structural combination of fuel element with thermoelectric element <class-ref scheme="cpc">G21C3/40</class-ref>; nuclear power plants using thermionic converters <class-ref scheme="cpc">G21D7/04</class-ref>; structural combination of a radioactive source with a thermionic converter, e.g. radioisotope batteries <class-ref scheme="cpc">G21H1/10</class-ref>; generators in which thermal or kinetic energy is converted into electrical energy by ionisation of a fluid and removal of the charge therefrom <class-ref scheme="cpc">H02N3/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J47/00" definition-exists="true" ipc-concordant="H01J47/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J47/00</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Tubes for determining the presence, intensity, density or energy of radiation or particles </text><reference><CPC-specific-text><text>discharge tubes using igniting by associated radioactive materials or fillings, e.g. current stabilising tubes <class-ref scheme="cpc">H01J17/32</class-ref></text></CPC-specific-text><text> ; photoelectric discharge tubes not involving the ionisation of a gas <class-ref scheme="cpc">H01J40/00</class-ref> </text><CPC-specific-text><text>; discharge tubes for measuring the pressure, partial pressure of introduced gas or for detecting presence of gas <class-ref scheme="cpc">H01J41/02</class-ref>; ionisation chambers using a solid dielectric <class-ref scheme="cpc">G01T3/008</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J47/001" definition-exists="false" ipc-concordant="H01J47/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/002" definition-exists="false" ipc-concordant="H01J47/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vessels or containers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/003" definition-exists="false" ipc-concordant="H01J47/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using tissue-equivalent materials</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/004" definition-exists="false" ipc-concordant="H01J47/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Windows permeable to X-rays, gamma-rays, or particles </text><reference><text>windows for discharge tubes with provision for emergence of electrons or ions from the vessel <class-ref scheme="cpc">H01J33/04</class-ref>; windows for X-ray tubes <class-ref scheme="cpc">H01J35/18</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/005" definition-exists="false" ipc-concordant="H01J47/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gas fillings </text><reference><text><class-ref scheme="cpc">H01J47/12</class-ref> takes precedence</text></reference><text>; Maintaining the desired pressure within the tube</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/006" definition-exists="false" ipc-concordant="H01J47/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tissue equivalent gas fillings</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J47/007" definition-exists="false" ipc-concordant="H01J47/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flash detectors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J47/008" definition-exists="false" ipc-concordant="H01J47/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Drift detectors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J47/02" definition-exists="false" ipc-concordant="H01J47/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ionisation chambers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/022" definition-exists="false" ipc-concordant="H01J47/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Calibration thereof</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/024" definition-exists="false" ipc-concordant="H01J47/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Well-type ionisation chambers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/026" definition-exists="false" ipc-concordant="H01J47/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gas flow ionisation chambers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/028" definition-exists="false" ipc-concordant="H01J47/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a liquid dielectric</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/04" definition-exists="false" ipc-concordant="H01J47/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Capacitive ionisation chambers, e.g. the electrodes of which are used as electrometers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J47/06" definition-exists="false" ipc-concordant="H01J47/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Proportional counter tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/062" definition-exists="false" ipc-concordant="H01J47/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiwire proportional counter tubes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/065" definition-exists="false" ipc-concordant="H01J47/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Well-type proportional counter tubes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/067" definition-exists="false" ipc-concordant="H01J47/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gas flow proportional counter tubes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J47/08" definition-exists="false" ipc-concordant="H01J47/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Geiger-Müller counter tubes </text><CPC-specific-text><reference><text>gas filling with very short deionisation times <class-ref scheme="cpc">H01J17/64</class-ref>, <class-ref scheme="cpc">H01T</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J47/10" definition-exists="false" ipc-concordant="H01J47/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spark counters </text><reference><text><class-ref scheme="cpc">H01J47/14</class-ref> takes precedence; spark gaps <class-ref scheme="cpc">H01T</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J47/12" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Neutron detector tubes, e.g. BF<sub>3</sub> tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/1205" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using nuclear reactions of the type (n, alpha) in solid materials, e.g. Boron-10 (n,alpha) Lithium-7, Lithium-6 (n, alpha)Hydrogen-3</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/1211" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1211</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ionisation chambers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J47/1216" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1216</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gamma compensated</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/1222" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Proportional counters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/1227" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fission detectors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/1233" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1233</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ionisation chambers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/1238" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1238</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Counters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J47/1244" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiwire counters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/125" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Helium ionisation detectors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/1255" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ionisation chambers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/1261" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Counters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J47/1266" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-wire counters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/1272" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>BF<sub>3</sub> tubes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/1277" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1277</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light-nuclei-recoil ionisation detectors, e.g. using protons, alpha-particles</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/1283" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ionisation chambers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/1288" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Counters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J47/1294" definition-exists="false" ipc-concordant="H01J47/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/1294</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-wire counters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J47/14" definition-exists="false" ipc-concordant="H01J47/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Parallel electrode spark or streamer chambers</text></title-part><title-part><text>Wire spark or streamer chambers </text><CPC-specific-text><reference><text>circuit arrangements with multi-wire or parallel-plate chambers for recording of movements or tracks of particles <class-ref scheme="cpc">G01T5/12</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/16" definition-exists="false" ipc-concordant="H01J47/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by readout of each individual wire</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/18" definition-exists="false" ipc-concordant="H01J47/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the readout being electrical </text><reference><text><class-ref scheme="cpc">H01J47/20</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/20" definition-exists="false" ipc-concordant="H01J47/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the readout employing electrical or mechanical delay lines, e.g. magnetostrictive delay lines</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J47/22" definition-exists="false" ipc-concordant="H01J47/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by another type of readout</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/24" definition-exists="false" ipc-concordant="H01J47/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the readout being acoustical</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J47/26" definition-exists="false" ipc-concordant="H01J47/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J47/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the readout being optical</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J49/00" definition-exists="true" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J49/00</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Particle spectrometers or separator tubes</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>In classifying particle separators, no distinction is made between spectrometry and spectrography, the difference being only in the manner of detection which in the first case is electrical and in the second case is by means of a photographic film.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J49/0004" definition-exists="true" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Imaging particle spectrometry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J49/0009" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Calibration of the apparatus</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J49/0013" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H01J49/0013</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Miniaturised spectrometers, e.g. having smaller than usual scale, integrated conventional components</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/0018" definition-exists="true" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J49/0018</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Microminiaturised spectrometers, e.g. chip-integrated devices, MicroElectro-Mechanical Systems [MEMS]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J49/0022" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H01J49/0022</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Portable spectrometers, e.g. devices comprising independent power supply, constructional details relating to portability </text><reference><text>small scale devices <u>per se</u> <class-ref scheme="cpc">H01J49/0013</class-ref> and <class-ref scheme="cpc">H01J49/0018</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J49/0027" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methods for using particle spectrometers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/0031" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Step by step routines describing the use of the apparatus </text><reference><text><class-ref scheme="cpc">H01J49/0081</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/0036" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>H01J49/0036</classification-symbol><class-title date-revised="2023-01-01"><title-part><CPC-specific-text><text>Step by step routines describing the handling of the data generated during a measurement</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J49/004" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H01J49/004</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Combinations of spectrometers, tandem spectrometers, e.g. MS/MS, MSn</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/0045" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the fragmentation or other specific reaction</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/005" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by collision with gas, e.g. by introducing gas or by accelerating ions with an electric field</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0054" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by an electron beam, e.g. electron impact dissociation, electron capture dissociation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0059" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0059</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by a photon beam, photo-dissociation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0063" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by applying a resonant excitation voltage</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0068" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by collision with a surface, e.g. surface induced dissociation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0072" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by ion/ion reaction, e.g. electron transfer dissociation, proton transfer dissociation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0077" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0077</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specific reactions other than fragmentation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/0081" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tandem in time, i.e. using a single spectrometer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/0086" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Accelerator mass spectrometers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/009" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spectrometers having multiple channels, parallel analysis</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J49/0095" definition-exists="false" ipc-concordant="H01J49/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Particular arrangements for generating, introducing or analyzing both positive and negative analyte ions </text><reference><text>ion/ion reactions <class-ref scheme="cpc">H01J49/0072</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J49/02" definition-exists="false" ipc-concordant="H01J49/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/022" definition-exists="false" ipc-concordant="H01J49/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H01J49/022</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Circuit arrangements, e.g. for generating deviation currents or voltages </text><reference><text>regulating electric or magnetic variables in general, e.g. current, magnetic field <class-ref scheme="cpc">G05F</class-ref></text></reference><text>; Components associated with high voltage supply </text><reference><text>high voltage supply <u>per se</u> <class-ref scheme="cpc">H02M</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/025" definition-exists="false" ipc-concordant="H01J49/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detectors specially adapted to particle spectrometers </text><reference><text>data acquisition <class-ref scheme="cpc">H01J49/0036</class-ref>; detectors <u>per se</u> <class-ref scheme="cpc">G01T</class-ref>, e.g. <class-ref scheme="cpc">G01T1/28</class-ref>, <class-ref scheme="cpc">G01T1/29</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/027" definition-exists="false" ipc-concordant="H01J49/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>detecting image current induced by the movement of charged particles </text><reference><text><class-ref scheme="cpc">H01J49/38</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/04" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks</text></title-part><title-part><text>Arrangements for external adjustment of electron- or ion-optical components</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0404" definition-exists="true" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0404</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Capillaries used for transferring samples or ions </text><reference><text>electrospray nozzles <class-ref scheme="cpc">H01J49/167</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0409" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0409</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sample holders or containers </text><reference><text>containers for retaining a material to be analyzed, <class-ref scheme="cpc">B01L3/50</class-ref>, for DNA, <class-ref scheme="cpc">C12Q1/6834</class-ref>, for biological materials, <class-ref scheme="cpc">G01N33/543</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/0413" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0413</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for automated handling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/0418" definition-exists="true" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J49/0418</classification-symbol><class-title date-revised="2022-08-01"><title-part><CPC-specific-text><text>for laser desorption, e.g. matrix-assisted laser desorption/ionisation [MALDI] plates or surface enhanced laser desorption/ionisation [SELDI] plates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0422" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for gaseous samples </text><reference><text>interfaces to gas chromatographs <class-ref scheme="cpc">G01N30/7206</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/0427" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a membrane permeable to gases</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0431" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0431</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for liquid samples </text><reference><text>interfaces to liquid chromatographs <class-ref scheme="cpc">G01N30/7233</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/0436" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0436</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a membrane permeable to liquids</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/044" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for preventing droplets from entering the analyzer; Desolvation of droplets</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/0445" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for introducing as a spray, a jet or an aerosol </text><reference><text>electrospray ion sources <class-ref scheme="cpc">H01J49/165</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/045" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for using a nebulising gas, i.e. pneumatically assisted</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/0454" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0454</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for vaporising using mechanical energy, e.g. by ultrasonic vibrations</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0459" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0459</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for solid samples</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/0463" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Desorption by laser or particle beam, followed by ionisation as a separate step </text><reference><text>sample holder <u>per se</u> <class-ref scheme="cpc">H01J49/0418</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0468" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0468</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for heating or cooling the sample</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/0472" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for pyrolysis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/0477" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0477</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a hot fluid</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/0481" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0481</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for collisional cooling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/0486" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0486</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for monitoring the sample temperature</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/049" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/049</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for applying heat to desorb the sample; Evaporation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/0495" definition-exists="false" ipc-concordant="H01J49/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/0495</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vacuum locks; Valves </text><reference><text>valves <u>per se</u> <class-ref scheme="cpc">F16K</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/06" definition-exists="false" ipc-concordant="H01J49/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron- or ion-optical arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/061" definition-exists="true" ipc-concordant="H01J49/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H01J49/061</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Ion deflecting means, e.g. ion gates</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/062" definition-exists="false" ipc-concordant="H01J49/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ion guides </text><reference><text>linear ion traps performing mass selection <class-ref scheme="cpc">H01J49/4225</class-ref>, mass filters <class-ref scheme="cpc">H01J49/421</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/063" definition-exists="true" ipc-concordant="H01J49/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multipole ion guides, e.g. quadrupoles, hexapoles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/065" definition-exists="true" ipc-concordant="H01J49/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having stacked electrodes, e.g. ring stack, plate stack</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/066" definition-exists="true" ipc-concordant="H01J49/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ion funnels</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/067" definition-exists="true" ipc-concordant="H01J49/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ion lenses, apertures, skimmers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/068" definition-exists="false" ipc-concordant="H01J49/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting, supporting, spacing, or insulating electrodes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/08" definition-exists="false" ipc-concordant="H01J49/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron sources, e.g. for generating photo-electrons, secondary electrons or Auger electrons</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/10" definition-exists="false" ipc-concordant="H01J49/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ion sources</text></title-part><title-part><text>Ion guns</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/102" definition-exists="false" ipc-concordant="H01J49/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using reflex discharge, e.g. Penning ion sources</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/105" definition-exists="false" ipc-concordant="H01J49/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J49/105</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>using high-frequency excitation, e.g. microwave excitation, Inductively Coupled Plasma [ICP]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/107" definition-exists="false" ipc-concordant="H01J49/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for using several ion sources</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/12" definition-exists="false" ipc-concordant="H01J49/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using an arc discharge, e.g. of the duoplasmatron type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/123" definition-exists="false" ipc-concordant="H01J49/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Duoplasmatrons</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/126" definition-exists="false" ipc-concordant="H01J49/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Other arc discharge ion sources using an applied magnetic field</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/14" definition-exists="false" ipc-concordant="H01J49/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using particle bombardment, e.g. ionisation chambers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/142" definition-exists="true" ipc-concordant="H01J49/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/142</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a solid target which is not previously vapourised</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/145" definition-exists="false" ipc-concordant="H01J49/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using chemical ionisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/147" definition-exists="true" ipc-concordant="H01J49/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/147</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with electrons, e.g. electron impact ionisation, electron attachment </text><reference><text><class-ref scheme="cpc">H01J49/145</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/16" definition-exists="false" ipc-concordant="H01J49/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using surface ionisation, e.g. field-, thermionic- or photo-emission</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/161" definition-exists="false" ipc-concordant="H01J49/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/161</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using photoionisation, e.g. by laser</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/162" definition-exists="true" ipc-concordant="H01J49/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/162</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Direct photo-ionisation, e.g. single photon or multi-photon ionisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/164" definition-exists="true" ipc-concordant="H01J49/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/164</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Laser desorption/ionisation, e.g. matrix-assisted laser desorption/ionisation [MALDI] </text><reference><text>sample holders <class-ref scheme="cpc">H01J49/0418</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/165" definition-exists="true" ipc-concordant="H01J49/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrospray ionisation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/167" definition-exists="true" ipc-concordant="H01J49/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/167</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Capillaries and nozzles specially adapted therefor; </text><reference><text>electrostatic spraying <u>per se</u> <class-ref scheme="cpc">B05B5/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/168" definition-exists="false" ipc-concordant="H01J49/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/168</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>field ionisation, e.g. corona discharge </text><reference><text>atmospheric pressure corona discharge <u>per se</u> <class-ref scheme="cpc">H01T19/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/18" definition-exists="false" ipc-concordant="H01J49/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using spark ionisation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/20" definition-exists="false" ipc-concordant="H01J49/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic deflection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/22" definition-exists="false" ipc-concordant="H01J49/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrostatic deflection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/24" definition-exists="false" ipc-concordant="H01J49/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vacuum systems, e.g. maintaining desired pressures</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J49/26" definition-exists="true" ipc-concordant="H01J49/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J49/26</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Mass spectrometers or separator tubes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/28" definition-exists="false" ipc-concordant="H01J49/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Static spectrometers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/282" definition-exists="false" ipc-concordant="H01J49/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrostatic analysers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/284" definition-exists="false" ipc-concordant="H01J49/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrostatic and magnetic sectors with simple focusing, e.g. with parallel fields such as Aston spectrometer</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/286" definition-exists="false" ipc-concordant="H01J49/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J49/286</classification-symbol><class-title date-revised="2022-08-01"><title-part><CPC-specific-text><text>with energy analysis, e.g. Castaing filter </text><reference><text>in cathode-ray or electron-beam tubes <class-ref scheme="cpc">H01J29/84</class-ref>; electron- or ion-optical arrangements for separating electrons or ions from an analysing or processing beam <class-ref scheme="cpc">H01J37/05</class-ref>; micro- or spot-analysing tubes <class-ref scheme="cpc">H01J37/252</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/288" definition-exists="true" ipc-concordant="H01J49/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using crossed electric and magnetic fields perpendicular to the beam, e.g. Wien filter</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/30" definition-exists="false" ipc-concordant="H01J49/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J49/30</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>using magnetic analysers </text><CPC-specific-text><text>, e.g. Dempster spectrometer</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/305" definition-exists="false" ipc-concordant="H01J49/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with several sectors in tandem</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/32" definition-exists="false" ipc-concordant="H01J49/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using double focusing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/322" definition-exists="true" ipc-concordant="H01J49/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/322</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a magnetic sector of 90 degrees, e.g. Mattauch-Herzog type</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/324" definition-exists="false" ipc-concordant="H01J49/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/324</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with an electrostatic section of 90 degrees, e.g. Nier-Johnson type</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/326" definition-exists="false" ipc-concordant="H01J49/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/326</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with magnetic and electrostatic sectors of 90 degrees</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/328" definition-exists="true" ipc-concordant="H01J49/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/328</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a cycloidal trajectory by using crossed electric and magnetic fields, e.g. trochoidal type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/34" definition-exists="false" ipc-concordant="H01J49/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dynamic spectrometers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/36" definition-exists="true" ipc-concordant="H01J49/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Radio frequency spectrometers, e.g. Bennett-type spectrometers, Redhead-type spectrometers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/38" definition-exists="true" ipc-concordant="H01J49/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J49/38</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Omegatrons </text><CPC-specific-text><text>; using ion cyclotron resonance</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/40" definition-exists="false" ipc-concordant="H01J49/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Time-of-flight spectrometers </text><reference><text><class-ref scheme="cpc">H01J49/36</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/401" definition-exists="true" ipc-concordant="H01J49/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/401</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by orthogonal acceleration, e.g. focusing or selecting the ions, pusher electrode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/403" definition-exists="false" ipc-concordant="H01J49/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the acceleration optics and/or the extraction fields</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/405" definition-exists="true" ipc-concordant="H01J49/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H01J49/405</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>characterised by the reflectron, e.g. curved field, electrode shapes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/406" definition-exists="true" ipc-concordant="H01J49/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J49/406</classification-symbol><class-title date-revised="2022-08-01"><title-part><CPC-specific-text><text>with multiple reflections</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/408" definition-exists="true" ipc-concordant="H01J49/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/408</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with multiple changes of direction, e.g. by using electric or magnetic sectors, closed-loop time-of-flight</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/42" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Stability-of-path spectrometers, e.g. monopole, quadrupole, multipole, farvitrons</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/4205" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/4205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Device types</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/421" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/421</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mass filters, i.e. deviating unwanted ions without trapping</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J49/4215" definition-exists="true" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/4215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Quadrupole mass filters </text><reference><text><class-ref scheme="cpc">H01J49/4225</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/422" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Two-dimensional RF ion traps </text><reference><text>ion guides without mass selection <class-ref scheme="cpc">H01J49/062</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J49/4225" definition-exists="true" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/4225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multipole linear ion traps, e.g. quadrupoles, hexapoles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J49/423" definition-exists="true" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with radial ejection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J49/4235" definition-exists="true" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/4235</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stacked rings or stacked plates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/424" definition-exists="true" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/424</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Three-dimensional ion traps, i.e. comprising end-cap and ring electrodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/4245" definition-exists="true" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J49/4245</classification-symbol><class-title date-revised="2022-08-01"><title-part><CPC-specific-text><text>Electrostatic ion traps </text><reference><text><class-ref scheme="cpc">H01J49/422</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J49/425" definition-exists="true" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a logarithmic radial electric potential, e.g. orbitraps</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/4255" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/4255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with particular constructional features</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/426" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methods for controlling ions</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/4265" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J49/4265</classification-symbol><class-title date-revised="2022-08-01"><title-part><CPC-specific-text><text>Controlling the number of trapped ions; preventing space charge effects</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/427" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ejection and selection methods</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J49/4275" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/4275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Applying a non-resonant auxiliary oscillating voltage, e.g. parametric excitation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J49/428" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/428</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Applying a notched broadband signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J49/4285" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/4285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Applying a resonant signal, e.g. selective resonant ejection matching the secular frequency of ions </text><reference><text><class-ref scheme="cpc">H01J49/429</class-ref>, <class-ref scheme="cpc">H01J49/428</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J49/429" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/429</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Scanning an electric parameter, e.g. voltage amplitude or frequency</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J49/4295" definition-exists="false" ipc-concordant="H01J49/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/4295</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Storage methods</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J49/44" definition-exists="false" ipc-concordant="H01J49/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Energy spectrometers, e.g. alpha-, beta-spectrometers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/443" definition-exists="false" ipc-concordant="H01J49/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/443</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dynamic spectrometers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/446" definition-exists="false" ipc-concordant="H01J49/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time-of-flight spectrometers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J49/46" definition-exists="false" ipc-concordant="H01J49/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Static spectrometers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/463" definition-exists="false" ipc-concordant="H01J49/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using static magnetic fields</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/466" definition-exists="false" ipc-concordant="H01J49/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using crossed electric and magnetic fields perpendicular to the beam, e.g. Wien filter </text><reference><text><u>see</u> also <class-ref scheme="cpc">H01J49/288</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J49/48" definition-exists="false" ipc-concordant="H01J49/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electrostatic analysers, e.g. cylindrical sector, Wien filter</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/482" definition-exists="false" ipc-concordant="H01J49/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/482</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with cylindrical mirrors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/484" definition-exists="false" ipc-concordant="H01J49/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/484</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with spherical mirrors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/486" definition-exists="false" ipc-concordant="H01J49/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-01-01" status="published"><classification-symbol>H01J49/486</classification-symbol><class-title date-revised="2017-01-01"><title-part><CPC-specific-text><text>with plane mirrors, i.e. uniform field</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J49/488" definition-exists="false" ipc-concordant="H01J49/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J49/488</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with retarding grids</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="H01J61/00" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Discharge lamps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J61/00" definition-exists="true" ipc-concordant="H01J61/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J61/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Gas-discharge or vapour-discharge lamps </text><reference><text>arc lamps with consumable electrodes <class-ref scheme="cpc">H05B</class-ref>; electroluminescent lamps <class-ref scheme="cpc">H05B</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/02" definition-exists="true" ipc-concordant="H01J61/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/025" definition-exists="true" ipc-concordant="H01J61/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Associated optical elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/04" definition-exists="true" ipc-concordant="H01J61/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes </text><reference><text>for igniting <class-ref scheme="cpc">H01J61/54</class-ref></text></reference></title-part><title-part><text>Screens</text></title-part><title-part><text>Shields</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/045" definition-exists="true" ipc-concordant="H01J61/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Thermic screens or reflectors </text><reference><text>heat-reflecting coatings on the wall of the vessel <class-ref scheme="cpc">H01J61/35</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/06" definition-exists="true" ipc-concordant="H01J61/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Main electrodes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/067" definition-exists="false" ipc-concordant="H01J61/067" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for low-pressure discharge lamps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J61/0672" definition-exists="false" ipc-concordant="H01J61/067" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/0672</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the construction of the electrode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J61/0675" definition-exists="false" ipc-concordant="H01J61/067" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/0675</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the material of the electrode</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J61/0677" definition-exists="false" ipc-concordant="H01J61/067" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/0677</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the electron emissive material</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/073" definition-exists="true" ipc-concordant="H01J61/073" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/073</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for high-pressure discharge lamps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J61/0732" definition-exists="false" ipc-concordant="H01J61/073" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/0732</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the construction of the electrode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01J61/0735" definition-exists="false" ipc-concordant="H01J61/073" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/0735</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the material of the electrode</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01J61/0737" definition-exists="false" ipc-concordant="H01J61/073" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/0737</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the electron emissive material</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/09" definition-exists="false" ipc-concordant="H01J61/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hollow cathodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/10" definition-exists="false" ipc-concordant="H01J61/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shields, screens, or guides for influencing the discharge</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/103" definition-exists="true" ipc-concordant="H01J61/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shields, screens or guides arranged to extend the discharge path </text><reference><text><class-ref scheme="cpc">H01J61/106</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/106" definition-exists="false" ipc-concordant="H01J61/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetic means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/12" definition-exists="true" ipc-concordant="H01J61/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Selection of substances for gas fillings</text></title-part><title-part><text>Specified operating pressure or temperature</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/125" definition-exists="false" ipc-concordant="H01J61/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having an halogenide as principal component</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/14" definition-exists="false" ipc-concordant="H01J61/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having one or more carbon compounds as the principal constituents</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/16" definition-exists="true" ipc-concordant="H01J61/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having helium, argon, neon, krypton, or xenon as the principle constituent</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/18" definition-exists="false" ipc-concordant="H01J61/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a metallic vapour as the principal constituent</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/20" definition-exists="true" ipc-concordant="H01J61/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>mercury vapour</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/22" definition-exists="false" ipc-concordant="H01J61/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>vapour of an alkali metal</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/24" definition-exists="true" ipc-concordant="H01J61/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for obtaining or maintaining the desired pressure within the vessel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/26" definition-exists="true" ipc-concordant="H01J61/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for absorbing or adsorbing gas, e.g. by gettering</text></title-part><title-part><text>Means for preventing blackening of the envelope</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/28" definition-exists="true" ipc-concordant="H01J61/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for producing, introducing, or replenishing gas or vapour during operation of the lamp</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/30" definition-exists="true" ipc-concordant="H01J61/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels</text></title-part><title-part><text>Containers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/302" definition-exists="false" ipc-concordant="H01J61/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the material of the vessel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/305" definition-exists="false" ipc-concordant="H01J61/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flat vessels or containers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/307" definition-exists="false" ipc-concordant="H01J61/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/307</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with folded elongated discharge path</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/32" definition-exists="true" ipc-concordant="H01J61/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Special longitudinal shape, e.g. for advertising purposes </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H01J61/305</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/322" definition-exists="false" ipc-concordant="H01J61/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/322</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circular lamps</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/325" definition-exists="true" ipc-concordant="H01J61/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>U-shaped lamps</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/327" definition-exists="true" ipc-concordant="H01J61/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/327</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>"Compact"-lamps, i.e. lamps having a folded discharge path</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/33" definition-exists="false" ipc-concordant="H01J61/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/33</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Special shape of cross-section, e.g. for producing cool spot</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/34" definition-exists="true" ipc-concordant="H01J61/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Double-wall vessels or containers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/35" definition-exists="true" ipc-concordant="H01J61/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/35</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>provided with coatings on the walls thereof</text></title-part><title-part><text>Selection of materials for the coatings </text><reference><text>using coloured coatings <class-ref scheme="cpc">H01J61/40</class-ref>; using luminescent coatings <class-ref scheme="cpc">H01J61/42</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/36" definition-exists="false" ipc-concordant="H01J61/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Seals between parts of vessels</text></title-part><title-part><text>Seals for leading-in conductors</text></title-part><title-part><text>Leading-in conductors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/361" definition-exists="false" ipc-concordant="H01J61/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/361</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Seals between parts of vessel</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/363" definition-exists="false" ipc-concordant="H01J61/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/363</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>End-disc seals or plug seals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/365" definition-exists="false" ipc-concordant="H01J61/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/365</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Annular seals disposed between the ends of the vessel </text><reference><text><class-ref scheme="cpc">H01J61/363</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/366" definition-exists="false" ipc-concordant="H01J61/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/366</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Seals for leading-in conductors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/368" definition-exists="false" ipc-concordant="H01J61/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/368</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pinched seals or analogous seals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/38" definition-exists="true" ipc-concordant="H01J61/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Devices for influencing the colour or wavelength of the light</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/40" definition-exists="false" ipc-concordant="H01J61/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by light filters</text></title-part><title-part><text>by coloured coatings in or on the envelope</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/42" definition-exists="true" ipc-concordant="H01J61/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by transforming the wavelength of the light by luminescence</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/44" definition-exists="false" ipc-concordant="H01J61/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J61/44</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Devices characterised by the luminescent material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/46" definition-exists="false" ipc-concordant="H01J61/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Devices characterised by the binder or other non-luminescent constituent of the luminescent material, e.g. for obtaining desired pouring or drying properties</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/48" definition-exists="false" ipc-concordant="H01J61/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separate coatings of different luminous materials</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/50" definition-exists="false" ipc-concordant="H01J61/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Auxiliary parts or solid material within the envelope for reducing risk of explosion upon breakage of the envelope, e.g. for use in mines</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/52" definition-exists="true" ipc-concordant="H01J61/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling arrangements</text></title-part><title-part><text>Heating arrangements</text></title-part><title-part><text>Means for circulating gas or vapour within the discharge space </text><CPC-specific-text><reference><text>heating or cooling arrangements to promote ionisation for starting <class-ref scheme="cpc">H01J61/54</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/523" definition-exists="false" ipc-concordant="H01J61/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/523</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heating or cooling particular parts of the lamp</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/526" definition-exists="false" ipc-concordant="H01J61/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/526</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>heating or cooling of electrodes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/54" definition-exists="false" ipc-concordant="H01J61/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J61/54</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Igniting arrangements, e.g. promoting ionisation for starting</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/541" definition-exists="false" ipc-concordant="H01J61/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/541</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a bimetal switch</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/542" definition-exists="false" ipc-concordant="H01J61/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/542</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and an auxiliary electrode inside the vessel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01J61/544" definition-exists="false" ipc-concordant="H01J61/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/544</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and an auxiliary electrode outside the vessel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/545" definition-exists="false" ipc-concordant="H01J61/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/545</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an auxiliary electrode inside the vessel </text><reference><text><class-ref scheme="cpc">H01J61/542</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/547" definition-exists="false" ipc-concordant="H01J61/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/547</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an auxiliary electrode outside the vessel </text><reference><text><class-ref scheme="cpc">H01J61/544</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/548" definition-exists="false" ipc-concordant="H01J61/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/548</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using radioactive means to promote ionisation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/56" definition-exists="true" ipc-concordant="H01J61/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One or more circuit elements structurally associated with the lamp</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/58" definition-exists="false" ipc-concordant="H01J61/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps with both liquid anode and liquid cathode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/60" definition-exists="false" ipc-concordant="H01J61/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps in which the discharge space is substantially filled with mercury before ignition</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/62" definition-exists="false" ipc-concordant="H01J61/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps with gaseous cathode, e.g. plasma cathode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/64" definition-exists="false" ipc-concordant="H01J61/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J61/64</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Cathode glow lamps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/66" definition-exists="true" ipc-concordant="H01J61/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having one or more specially shaped cathodes, e.g. for advertising purposes </text><CPC-specific-text><text>alphanumeric</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/68" definition-exists="false" ipc-concordant="H01J61/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps in which the main discharge is between parts of a current-carrying guide, e.g. halo lamp</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/70" definition-exists="false" ipc-concordant="H01J61/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps with low-pressure unconstricted discharge </text><CPC-specific-text><text>having a cold pressure < 400 Torr</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/72" definition-exists="true" ipc-concordant="H01J61/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/74" definition-exists="false" ipc-concordant="H01J61/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a main light-emitting filling of difficult vaporisable metal vapour, e.g. sodium</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/76" definition-exists="false" ipc-concordant="H01J61/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/76</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a filling of permanent gas or gases only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J61/78" definition-exists="false" ipc-concordant="H01J61/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with cold cathode</text></title-part><title-part><text>with cathode heated only by discharge, e.g. high-tension lamp for advertising</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/80" definition-exists="false" ipc-concordant="H01J61/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps suitable only for intermittent operation, e.g. flash lamp</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/82" definition-exists="true" ipc-concordant="H01J61/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps with high-pressure unconstricted discharge </text><CPC-specific-text><text>having a cold pressure > 400 Torr</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/822" definition-exists="false" ipc-concordant="H01J61/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/822</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>High-pressure mercury lamps</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/825" definition-exists="false" ipc-concordant="H01J61/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>High-pressure sodium lamps</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/827" definition-exists="false" ipc-concordant="H01J61/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/827</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Metal halide arc lamps</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/84" definition-exists="false" ipc-concordant="H01J61/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/84</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps with discharge constricted by high pressure</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/86" definition-exists="false" ipc-concordant="H01J61/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/86</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/88" definition-exists="false" ipc-concordant="H01J61/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/88</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with discharge additionally constricted by envelope</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/90" definition-exists="false" ipc-concordant="H01J61/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps suitable only for intermittent operation, e.g. flash lamp</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/92" definition-exists="true" ipc-concordant="H01J61/92" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/92</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps with more than one main discharge path</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J61/94" definition-exists="false" ipc-concordant="H01J61/94" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J61/94</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Paths producing light of different wavelengths, e.g. for simulating daylight</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/95" definition-exists="false" ipc-concordant="H01J61/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/95</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps with control electrode for varying intensity or wavelength of the light, e.g. for producing modulated light</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/96" definition-exists="true" ipc-concordant="H01J61/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H01J61/96</classification-symbol><class-title date-revised="2019-01-01"><title-part><text>Lamps with light-emitting discharge path and separately-heated incandescent body within a common envelope, e.g. for simulating daylight</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J61/98" definition-exists="false" ipc-concordant="H01J61/98" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J61/98</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps with closely spaced electrodes heated to incandescence by light-emitting discharge, e.g. tungsten arc lamp</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J63/00" definition-exists="true" ipc-concordant="H01J63/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H01J63/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Cathode-ray or electron-stream lamps</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J63/02" definition-exists="true" ipc-concordant="H01J63/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J63/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details, e.g. electrode, gas filling, shape of vessel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J63/04" definition-exists="false" ipc-concordant="H01J63/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J63/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels provided with luminescent coatings</text></title-part><title-part><text>Selection of materials for the coatings</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J63/06" definition-exists="true" ipc-concordant="H01J63/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J63/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps with luminescent screen excited by the ray or stream</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J63/08" definition-exists="false" ipc-concordant="H01J63/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J63/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps with gas plasma excited by the ray or stream</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J65/00" definition-exists="true" ipc-concordant="H01J65/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J65/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps without any electrode inside the vessel</text></title-part><title-part><text>Lamps with at least one main electrode outside the vessel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J65/04" definition-exists="false" ipc-concordant="H01J65/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J65/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating </text><CPC-specific-text><text>plasma display panels</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01J65/042" definition-exists="false" ipc-concordant="H01J65/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J65/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by an external electromagnetic field</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J65/044" definition-exists="false" ipc-concordant="H01J65/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J65/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the field being produced by a separate microwave unit</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J65/046" definition-exists="false" ipc-concordant="H01J65/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J65/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the field being produced by using capacitive means around the vessel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01J65/048" definition-exists="false" ipc-concordant="H01J65/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J65/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the field being produced by using an excitation coil</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J65/06" definition-exists="false" ipc-concordant="H01J65/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J65/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps in which a gas filling is excited to luminesce by radioactive material structurally associated with the lamp, e.g. inside the vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01J65/08" definition-exists="true" ipc-concordant="H01J65/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J65/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamps in which a screen or coating is excited to luminesce by radioactive material located inside the vessel </text><CPC-specific-text><reference><text>direct conversion of radiation energy from radioactive sources into light <class-ref scheme="cpc">G21H3/02</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01J99/00" definition-exists="false" ipc-concordant="H01J99/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J99/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Subject matter not provided for in other groups of this subclass</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="H01J201/00" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/00</classification-symbol>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J201/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes common to discharge tubes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J201/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for eliminating deleterious effects</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/025" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>charging</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J201/19" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/19</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Thermionic cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/193" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/193</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Thin film cathodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/196" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/196</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emission assisted by other physical processes, e.g. field- or photo emission</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J201/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Heaters for thermionic cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/2803" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2803</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Characterised by the shape or size</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2807" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2807</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Block</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/281" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/281</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cage-like construction</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/2814" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2814</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>being a mesh-like network</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2817" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2817</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rods</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2821" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2821</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Envelope or cross-section</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/2825" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2825</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>being oval or elliptic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/2828" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2828</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>being rectangular or square</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/2832" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2832</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>being circular</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2835" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2835</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Folded</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/2839" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2839</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hair-pin or simple bend</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2842" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2842</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Conic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2846" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2846</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Loop</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/285" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Plurality of elements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2853" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2853</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Serpentine</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/2857" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2857</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>being coiled</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/286" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/286</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>being looped</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2864" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2864</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ribbon or bar</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2867" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2867</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spiral or helix</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/2871" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2871</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>being flattened</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/2875" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2875</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>being double, reverse helix or interwoven</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2878" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2878</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Thin film or film-like</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2882" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2882</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Variable winding density</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2885" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2885</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Twisted</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/2889" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2889</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Characterised by material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/2892" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2892</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coatings</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/2896" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/2896</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Insulating layers</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J201/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/304" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/304</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Field emission cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/30403" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30403</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the emitter shape</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30407" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J2201/30407</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Microengineered point emitters</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J201/30411" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30411</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>conical shaped, e.g. Spindt type</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J201/30415" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30415</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>needle shaped</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30419" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30419</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pillar shaped emitters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30423" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J2201/30423</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Microengineered edge emitters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30426" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30426</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coatings on the emitter surface, e.g. with low work function materials</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/3043" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/3043</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fibres</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30434" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30434</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Nanotubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30438" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30438</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Particles</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30442" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30442</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Whiskers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/30446" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30446</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the emitter material</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30449" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30449</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Metals and metal alloys</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30453" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30453</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carbon types</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J201/30457" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30457</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diamond</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J201/30461" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30461</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Graphite</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J201/30465" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30465</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fullerenes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J201/30469" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30469</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carbon nanotubes (CNTs)</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J201/30473" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30473</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Amorphous carbon</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J201/30476" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30476</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diamond-like carbon [DLC]</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/3048" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/3048</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Semiconductor materials</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30484" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30484</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carbides</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30488" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30488</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Nitrides</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30492" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30492</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Borides</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/30496" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/30496</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Oxides</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/306" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/306</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ferroelectric cathodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/308" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/308</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Semiconductor cathodes, e.g. having PN junction layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/312" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/312</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having an electric field perpendicular to the surface thereof</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/3125" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/3125</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Metal-insulator-Metal [MIM] emission type cathodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/316" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/316</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having an electric field parallel to the surface thereof, e.g. thin film cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/3165" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/3165</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Surface conduction emission type cathodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/317" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/317</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with other synergetic effects, e.g. secondary, photo- or thermal emission</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/319" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/319</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit elements associated with the emitters by direct integration</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/3195" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/3195</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resistive members, e.g. resistive layers</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J201/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Secondary emission electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J201/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Photoemissive electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J201/342" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/342</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J201/3421" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/3421</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Composition of the emitting surface</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/3423" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/3423</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Semiconductors, e.g. GaAs, NEA emitters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/3425" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/3425</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Metals, metal alloys</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/3426" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/3426</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Alkaline metal compounds, e.g. Na-K-Sb</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J201/3428" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2201/3428</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Organo-metallic compounds, e.g. Ferrocene</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J203/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron or ion optical arrangements common to discharge tubes or lamps</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J203/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron guns</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J203/0204" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0204</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using cold cathodes, e.g. field emission cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J203/0208" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0208</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J203/0212" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0212</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gate electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J203/0216" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0216</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the form or structure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J203/022" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shapes or dimensions of gate openings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J203/0224" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0224</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangement of gate openings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J203/0228" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0228</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Curved/extending upwardly</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J203/0232" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0232</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J203/0236" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0236</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Relative position to the emitters, cathodes or substrates</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J203/024" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Focusing electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J203/0244" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0244</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the form or structure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J203/0248" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0248</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shapes or dimensions of focusing electrode openings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J203/0252" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0252</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangement of focusing electrode openings</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J203/0256" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0256</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J203/026" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Relative position to the gateelectrodes, emitters, cathodes or substrates</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J203/0264" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0264</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>In the same plane as the gate electrodes or cathodes</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J203/0268" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0268</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Insulation layer</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J203/0272" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0272</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for gate electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J203/0276" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0276</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for focusing electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J203/028" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the shape</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J203/0284" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0284</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dimensions of openings</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J203/0288" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0288</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J203/0292" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0292</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Potentials applied to the electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J203/0296" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/0296</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spin-polarised beams</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J203/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2203/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ion guns</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J209/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus and processes for manufacture of discharge tubes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J209/01" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Generalised techniques</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/012" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/012</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coating</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J209/015" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/015</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Machines therefor</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/017" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/017</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cleaning</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J209/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manufacture of cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/022" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J209/0223" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/0223</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Field emission cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J209/0226" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/0226</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sharpening or resharpening of emitting point or edge</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J209/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Assembling together the component parts of the discharge tube</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/185" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Machines therefor, e.g. electron gun assembling devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J209/236" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/236</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manufacture of magnetic deflecting devices</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/2363" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/2363</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coils</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J209/2366" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/2366</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Machines therefor, e.g. winding, forming, welding, or the like</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J209/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sealing parts of the vessel to provide a vacuum enclosure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/261" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/261</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus used for sealing vessels, e.g. furnaces, machines or the like</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J209/262" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/262</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>means for applying sealing materials, e.g. frit paste dispensers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/264" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/264</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Materials for sealing vessels, e.g. frit glass compounds, resins or structures</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/265" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Surfaces for sealing vessels</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J209/267" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/267</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>shaped surfaces or flanges</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J209/268" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/268</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>treated surfaces and surface preparations, e.g. to improve adhesion</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J209/38" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of maintenance of pressure in the vessel</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/383" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/383</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vacuum pumps</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/385" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/385</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gettering</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J209/3855" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/3855</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Getter materials</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/387" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/387</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gas filling</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/389" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/389</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Degassing</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J209/3893" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/3893</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by a discharge</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J209/3896" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/3896</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by heating</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J209/46" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Handling of tube components during manufacture</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J209/463" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/463</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Identifying or selecting component pieces</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J209/466" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2209/466</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Marking, e.g. bar-codes</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J211/00" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J2211/00</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Plasma display panels with alternate current induction of the discharge, e.g. AC-PDPs</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J211/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>AC-PDPs with at least one main electrode being out of contact with the plasma</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with main electrodes provided on both sides of the discharge space</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with main electrodes provided only on one side of the discharge space</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with main electrodes provided inside or on the side face of the spacers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>containing a plurality of independent closed structures for containing the gas, e.g. plasma tube array [PTA] display panels</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J211/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional details</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J211/225" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Material of electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J211/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sustain electrodes or scan electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J211/245" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shape, e.g. cross section or pattern</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J211/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Address electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J211/265" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shape, e.g. cross section or pattern</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J211/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Auxiliary electrodes, e.g. priming electrodes or trigger electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J211/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Floating electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J211/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Disposition of the electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J211/323" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/323</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mutual disposition of electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J211/326" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/326</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Disposition of electrodes with respect to cell parameters </text><reference><text><class-ref scheme="cpc">H01J2211/323</class-ref> takes precedence</text></reference><text>, e.g. electrodes within the ribs</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels, containers or parts thereof, e.g. substrates</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J211/36" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spacers, barriers, ribs, partitions or the like</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J211/361" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/361</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterized by the shape</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J211/363" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/363</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cross section of the spacers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J211/365" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/365</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pattern of the spacers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J211/366" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/366</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterized by the material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J211/368" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/368</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dummy spacers, e.g. in a non display region</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J211/38" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dielectric or insulating layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J211/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Layers for protecting or enhancing the electron emission, e.g. MgO layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J211/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fluorescent layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J211/44" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical arrangements or shielding arrangements, e.g. filters or lenses</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J211/442" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/442</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Light reflecting means</text></title-part><title-part><text>Anti-reflection means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J211/444" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/444</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for improving contrast or colour purity, e.g. black matrix or light shielding means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J211/446" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/446</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electromagnetic shielding means</text></title-part><title-part><text>Antistatic means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J211/448" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/448</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Near infrared shielding means</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/46" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Connecting or feeding means, e.g. leading-in conductors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/48" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sealing, e.g. seals specially adapted for leading-in conductors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Filling, e.g. selection of gas mixture</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/52" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for absorbing or adsorbing the gas mixture, e.g. by gettering</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/54" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for exhausting the gas</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/62" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit arrangements </text><reference><text>circuits or methods for driving PDP's <class-ref scheme="cpc">G09G3/28</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J211/66" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2211/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling arrangements </text><reference><text>cooling or supporting means not being part of the tube <class-ref scheme="cpc">H05K</class-ref></text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J217/00" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J2217/00</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Gas-filled discharge tubes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J217/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes </text><reference><text>for display panels not making use of alternating current <class-ref scheme="cpc">H01J2217/492</class-ref>; for discharge tubes in general <class-ref scheme="cpc">H01J2201/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J217/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J217/062" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>thermionic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J217/065" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>heated by the discharge</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J217/067" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold cathodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J217/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J217/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J217/38" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold-cathode tubes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J217/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gas discharge switches</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J217/402" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/402</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple switches</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J217/4025" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/4025</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for addressing electro-optical devices, i.e. LCD's</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J217/49" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/49</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Display panels, e.g. not making use of alternating current </text><reference><text><class-ref scheme="cpc">H01J2211/10</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J217/491" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/491</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by problems peculiar to plasma displays</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J217/4915" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/4915</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Luminosity</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J217/492" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/492</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J217/49207" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/49207</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J217/49214" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/49214</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shape</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J217/49221" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/49221</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mutual disposition</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J217/49228" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/49228</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Crossed electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J217/49235" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/49235</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Side-by-side electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J217/49242" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/49242</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Auxiliary electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J217/4925" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/4925</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting, supporting, spacing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J217/49257" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/49257</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for isolating electrodes from the discharge, e.g. dielectric layers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J217/49264" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/49264</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J217/49271" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/49271</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spacers between front and back panels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J217/49278" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-10-01" status="published"><classification-symbol>H01J2217/49278</classification-symbol><class-title date-revised="2015-10-01"><title-part><text>Coatings </text><reference><text><class-ref scheme="cpc">H01J2217/49292</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J217/49285" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>H01J2217/49285</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Associated optical means</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J217/49292" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/49292</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Filters</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J217/494" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/494</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>A.C. panels</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J217/498" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2217/498</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hybrid panels (AC and DC)</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J223/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of transit-time tubes of the types covered by group <class-ref scheme="cpc">H01J2225/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J223/005" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling methods or arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J223/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes</text></title-part><title-part><text>Magnetic control means</text></title-part><title-part><text>Screens</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/027" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Collectors</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/0275" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/0275</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multistage collectors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/033" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Collector cooling devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/05" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a cylindrical emissive surface, e.g. cathodes for magnetrons</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron or ion guns</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/065" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>producing a solid cylindrical beam</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/07" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>producing a hollow cylindrical beam</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/075" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/075</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetron injection guns</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/083" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrostatic focusing arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/087" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic focusing arrangements</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J223/0873" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/0873</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with at least one axial- field reversal along the interaction space, e.g. P.P.M. focusing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J223/0876" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/0876</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with arrangements improving the linearity and homogeniety of the axial field, e.g. field straightener</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/09" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electric system for directing or deflecting the discharge along a desired path, e.g. E-type</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnet systems for directing or deflecting the discharge along a desired path, e.g. a spiral path</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/11" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for reducing noise</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J223/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels</text></title-part><title-part><text>Containers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J223/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Leading-in arrangements</text></title-part><title-part><text>Seals therefor</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/15" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for preventing wave energy leakage structurally associated with tube leading-in arrangements, e.g. filters, chokes, attenuating devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J223/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/165" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manufacturing processes or apparatus therefore</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resonators</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cavity resonators</text></title-part><title-part><text>Adjustment or tuning thereof</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J223/207" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/207</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tuning of single resonator</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J223/213" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/213</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Simultaneous tuning of more than one resonator, e.g. resonant cavities of a magnetron</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Connections between resonators, e.g. strapping for connecting resonators of a magnetron</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Slow-wave structures, e.g. delay systems</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Helical slow-wave structures</text></title-part><title-part><text>Adjustment therefor</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J223/27" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/27</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Helix-derived slow-wave structures</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Interdigital slow-wave structures</text></title-part><title-part><text>Adjustment therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J223/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J223/36" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/38" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>to or from the discharge</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>to or from the interaction circuit</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the interaction circuit being a helix or a helix-derived slow- wave structure</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/44" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rod-type coupling devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/46" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Loop coupling devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J223/48" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for linking interaction circuit with coaxial lines</text></title-part><title-part><text>Devices of the coupled helices type</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J223/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the interaction circuit being a helix or derived from a helix</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J223/52" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the coupled helices being disposed coaxially around one another</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J223/54" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2223/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Filtering devices preventing unwanted frequencies or modes to be coupled to, or out of, the interaction circuit</text></title-part><title-part><text>Prevention of high frequency leakage in the environment</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J225/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transit-time tubes, e.g. Klystrons, travelling-wave tubes, magnetrons</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J225/005" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gas-filled transit-time tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J225/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/025" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with an electron stream following a helical path</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H01J2225/04</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Tubes having one or more resonators, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly density modulation, e.g. Heaff tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes having only one resonator, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly velocity modulation, e.g. Lüdi-Klystron</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with electron stream perpendicular to the axis of the resonator</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/11" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Extended interaction Klystrons</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with pencil-like electron stream in the axis of the resonators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with tube-like electron stream coaxial with the axis of the resonators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with pencil-like electron stream perpendicular to the axis of the resonators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with radial or disc-like electron stream perpendicular to the axis of the resonators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having special arrangements in the space between resonators, e.g. resistive-wall amplifier tube, space-charge amplifier tube, velocity- jump tube</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reflex Klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the electron stream is in the axis of the resonator or resonators and is pencil-like before reflection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the electron stream is coaxial with the axis of the resonator or resonators and is tube-like before reflection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the electron stream is perpendicular to the axis of the resonator or resonators and is pencil-like before reflection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which the electron stream is perpendicular to the axis of the resonator or resonators and is radial or disc-like before reflection</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with plural reflection, e.g. Coeterier tube</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J225/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Travelling-wave tubes</text></title-part><title-part><text>Tubes in which a travelling wave is simulated at spaced gaps</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/36" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/38" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the forward travelling wave being utilised</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the backward travelling wave being utilised</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and with a magnet system producing an H-field crossing the E-field</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/44" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the forward travelling wave being utilised</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/46" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the backward travelling wave being utilised</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/48" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes in which two electron streams of different velocities interact with one another, e.g. electron-wave tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/49" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/49</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes using the parametric principle, e.g. for parametric amplification</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J225/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/52" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/54" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having only one cavity or other resonator, e.g. neutrode tube</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J225/55" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/55</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coaxial cavity magnetrons</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J225/56" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with interdigital arrangements of anodes, e.g. turbator tube</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J225/58" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a number of resonators</text></title-part><title-part><text>having a composite resonator, e.g. a helix</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J225/587" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/587</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multi-cavity magnetrons</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J225/593" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/593</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rising-sun magnetrons</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with an electron space having a shape that prevents any electron from moving completely around the cathode or guide electrode</text></title-part><title-part><text>Linear magnetrons</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J225/61" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/61</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hybrid tubes, i.e. tubes comprising a klystron section and a travelling-wave section</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J225/62" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Strophotrons, i.e. tubes with H-field crossing the E-field and functioning with plural reflection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J225/64" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Turbine tubes, i.e. tubes with H-field crossing the E-field and functioning with reversed cyclotron action</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J225/66" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with electron stream crossing itself and thereby interacting or interfering with itself</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J225/68" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes specially designed to act as oscillator with positive grid and retarding field, e.g. for Barkhausen-Kurz oscillators</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/70" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with resonator having distributed inductance with capacitance, e.g. Pintsch tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J225/72" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in which a standing wave or a considerable part thereof is produced along an electrode, e.g. Clavier tube</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J225/74" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes specially designed to act as transit-time diode oscillators, e.g. monotron</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J225/76" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/76</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dynamic electron-multiplier tubes, e.g. Farnsworth multiplier tube, multipactor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J225/78" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2225/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with electron stream modulated by deflection in a resonator</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J229/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of cathode ray tubes or electron beam tubes </text><reference><text><class-ref scheme="cpc">H01J2329/00</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/0007" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Elimination of unwanted or stray electromagnetic effects</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/0015" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0015</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Preventing or cancelling fields leaving the enclosure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/0023" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0023</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Passive means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/003" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Preventing or cancelling fields entering the enclosure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/0038" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0038</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Active means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/0046" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0046</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Preventing or cancelling fields within the enclosure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/0053" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0053</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Demagnetisation</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/0061" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0061</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling arrangements</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/0069" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0069</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Active means, e.g. fluid flow</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/0076" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>applied to the faceplate</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/0084" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0084</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Translucent coolant, e.g. flowing across faceplate</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/0092" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Passive means, e.g. fins, heat conductors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/07" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shadow masks</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/0705" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0705</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting arrangement of assembly to vessel</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/0711" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0711</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spring and plate (clip) type</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/0716" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0716</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting arrangements of aperture plate to frame or vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/0722" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0722</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frame</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/0727" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0727</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aperture plate</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/0733" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0733</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/0738" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0738</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mitigating undesirable mechanical effects</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/0744" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0744</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vibrations</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/075" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/075</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam passing apertures, e.g. geometrical arrangements</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/0755" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0755</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by aperture shape</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J229/0761" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0761</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Uniaxial masks having parallel slit apertures, i.e. Trinitron type</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/0766" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0766</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of skirt or border</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/0772" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0772</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apertures, cut-outs, depressions, or the like</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/0777" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0777</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coatings</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/0783" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0783</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>improving thermal radiation properties</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/0788" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0788</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Parameterised dimensions of aperture plate, e.g. relationships, polynomial expressions</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/0794" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/0794</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Geometrical arrangements, e.g. curvature</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Phosphor screens</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/183" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>multi-layer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/186" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Geometrical arrangement of phosphors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/48" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron guns</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/4803" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4803</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/4806" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4806</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shield centering cups</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/481" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/481</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Focusing electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/4813" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4813</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pre-focusing</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/4817" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4817</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Accelerating electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/482" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/482</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Extraction grids</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/4824" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4824</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional arrangements of electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/4827" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4827</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes formed on surface of common cylindrical support</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/4831" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4831</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrode supports</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/4834" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4834</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrical arrangements coupled to electrodes, e.g. potentials</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/4837" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4837</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the potentials applied</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/4841" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4841</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dynamic potentials</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/4844" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4844</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by beam passing apertures or combinations</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/4848" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4848</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aperture shape as viewed along beam axis</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/4851" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4851</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>trapezoidal</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J229/4855" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4855</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with rounded end or ends</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/4858" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4858</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>parallelogram</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J229/4862" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4862</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>square</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J229/4865" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4865</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>rectangle</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J229/4868" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4868</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with rounded end or ends</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/4872" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4872</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>circular</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/4875" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4875</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>oval</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/4879" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4879</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>non-symmetric about field scanning axis</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/4882" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4882</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>non-symmetric about line scanning axis</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/4886" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4886</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>polygonal</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J229/4889" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4889</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>cross shaped</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/4893" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4893</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Interconnected apertures</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/4896" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/4896</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>complex and not provided for</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Plurality of guns or beams</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/502" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/502</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Three beam guns, e.g. for colour CRTs</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/505" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/505</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrays</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/507" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/507</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multi-beam groups, e.g. number of beams greater than number of cathodes</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/56" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Correction of beam optics</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/563" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/563</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aberrations by type</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/5632" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/5632</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spherical</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/5635" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/5635</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Astigmatism</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/5637" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/5637</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Colour purity</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/568" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/568</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using supplementary correction devices</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/5681" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/5681</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>magnetic</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/5682" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/5682</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Permanently magnetised materials, e.g. permanent magnets</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/5684" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/5684</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic materials, e.g. soft iron</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J229/5685" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/5685</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cross-arms field shaper</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/5687" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/5687</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Auxiliary coils</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J229/5688" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/5688</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Velocity modulation</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/58" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron beam control inside the vessel</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/581" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/581</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by magnetic means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/582" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/582</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by electrostatic means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/583" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/583</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>at the source</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/5835" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/5835</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>cooperating with the electron gun</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/585" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/585</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>at the screen</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/587" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/587</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>between the source and the screen</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/70" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron beam control outside the vessel</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/703" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/703</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by magnetic fields</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/7031" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/7031</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cores for field producing elements, e.g. ferrite</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/7032" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/7032</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Conductor design and distribution</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/7033" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/7033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Winding</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/7035" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/7035</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Wires and conductors</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J229/7036" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/7036</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Form of conductor</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J229/7037" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/7037</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>flat, e.g. foil, or ribbon type</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/7038" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/7038</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coil separators and formers</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/86" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/86</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels and containers</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8603" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8603</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Neck or cone portions of the CRT vessel</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/8606" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8606</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the shape</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/8609" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8609</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non circular cross-sections</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8613" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8613</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Faceplates</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/8616" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8616</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by shape</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J229/862" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/862</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Parameterised shape, e.g. expression, relationship or equation</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8623" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8623</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Substrates</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8626" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8626</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frames</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/863" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/863</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Passive shielding means associated with the vessel</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8631" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8631</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coatings</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/8632" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8632</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8633" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8633</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Meshes and patterns</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8634" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8634</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic shielding</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8635" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8635</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Antistatic shielding</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8636" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8636</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electromagnetic shielding</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8637" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8637</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical shielding, e.g. against water or abrasion</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8638" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8638</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ionising radiation shielding, e.g. X-rays</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/87" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/87</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for avoiding vessel implosion</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/875" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/875</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means substantially covering the output face, e.g. resin layers, protective panels</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/88" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/88</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coatings</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/882" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/882</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having particular electrical resistive or conductive properties</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/885" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/885</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having particular electrical insulation properties</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/887" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/887</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having particular X-ray shielding properties</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/89" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/89</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical components associated with the vessel</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8901" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8901</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fixing of optical components to the vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8903" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8903</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fibre optic components</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8905" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8905</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Direction sensitive devices for controlled viewing angle</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8907" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8907</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Image projection devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8909" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8909</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Baffles, shutters, apertures or the like against external light</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/8911" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8911</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Large-scale devices, e.g. foldable screens</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8913" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8913</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anti-reflection, anti-glare, viewing angle and contrast improving treatments or devices</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/8915" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8915</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Surface treatment of vessel or device, e.g. controlled surface roughness</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/8916" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8916</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>inside the vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/8918" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8918</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using interference effects</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/892" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/892</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Effect varying over surface</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/8922" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8922</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus attached to vessel and not integral therewith</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8924" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8924</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having particular properties for protecting the vessel, e.g. against abrasion, water or shock</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8926" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8926</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Active components, e.g. LCD's, indicators, illuminators and moving devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/8928" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/8928</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Laser CRTs</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/893" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/893</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using lenses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/899" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/899</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Photographic devices (permanent recording of images)</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/92" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/92</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means providing or assisting electrical connection with or within the tube</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/922" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/922</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>within the tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/925" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/925</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>associated with the high tension [HT], e.g. anode potentials</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/927" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/927</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>associated with digital scanning</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/94" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/94</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for obtaining or maintaining the desired pressure within the tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J229/96" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/96</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit elements other than coils, reactors or the like, associated with the tube</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/962" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/962</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>associated with the HT</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/964" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/964</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>associated with the deflection system</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J229/966" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/966</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>associated with the gun structure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J229/968" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2229/968</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resistors</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J231/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathode ray tubes or electron beam tubes </text><reference><text><class-ref scheme="cpc">H01J2329/00</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J231/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>CRTs having luminescent screens</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J231/121" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for indicating the position of the beam, e.g. beam indexing</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/123" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by direct current detection, e.g. collecting electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J231/125" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a plurality of electron guns within the tube envelope</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/1255" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/1255</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>two or more neck portions containing one or more guns</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J231/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Imaging and conversion tubes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J231/50005" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by form of illumination</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/5001" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/5001</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Photons</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J231/50015" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50015</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Light</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J231/50021" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50021</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ultra-violet</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J231/50026" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50026</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Infra-red</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J231/50031" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50031</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>High energy photons</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J231/50036" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50036</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>X-rays</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/50042" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50042</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Particles</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J231/50047" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50047</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Charged particles</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/50052" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50052</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical vibrations, e.g. sound</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J231/50057" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50057</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by form of output stage</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/50063" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50063</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/50068" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50068</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrical</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J231/50073" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50073</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Charge coupled device [CCD]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J231/50078" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50078</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resistive anode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J231/50084" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50084</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using light or electron beam scanning</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/50089" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50089</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Having optical stage before electrical conversion</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J231/50094" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/50094</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Charge coupled device [CCD]</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J231/501" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/501</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>including multiplication stage</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/5013" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/5013</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with secondary emission electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J231/5016" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/5016</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Michrochannel plates [MCP]</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J231/503" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/503</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with scanning or gating optics</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/5033" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/5033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electrostatic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/5036" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/5036</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>magnetic</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J231/505" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/505</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with non-scanning optics</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/5053" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/5053</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electrostatic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J231/5056" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2231/5056</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>magnetic</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J235/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>X-ray tubes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J235/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrical arrangements</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/023" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Connecting of signals or tensions to or through the vessel</text></title-part></class-title>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/0233" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/0233</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>High tension</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/0236" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/0236</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indirect coupling, e.g. capacitive or inductive</text></title-part></class-title></classification-item></classification-item></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J235/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathode assembly</text></title-part></class-title>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/062" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold cathodes</text></title-part></class-title></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/064" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/064</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Movement of cathode</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/066" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/068" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/068</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multi-cathode assembly</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J235/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Targets (anodes) and X-ray converters</text></title-part></class-title>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/081" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/081</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Target material</text></title-part></class-title>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/082" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fluids, e.g. liquids, gases</text></title-part></class-title></classification-item></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/083" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bonding or fixing with the support or substrate</text></title-part></class-title>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/084" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/084</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Target-substrate interlayers or structures, e.g. to control or prevent diffusion or improve adhesion</text></title-part></class-title></classification-item></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/085" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Target treatment, e.g. ageing, heating</text></title-part></class-title></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/086" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Target geometry</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/088" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/088</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Laminated targets, e.g. plurality of emitting layers of unique or differing materials</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J235/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Drive means for anode (target) substrate</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/1006" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1006</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supports or shafts for target or substrate</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/1013" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1013</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fixing to the target or substrate</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/102" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Materials for the shaft</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/1026" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1026</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means (motors) for driving the target (anode)</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/1033" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>mounted within the vacuum vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/104" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/104</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the shape</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/1046" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1046</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bearings and bearing contact surfaces</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/1053" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1053</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Retainers or races</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/106" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dynamic pressure bearings, e.g. helical groove type</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/1066" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1066</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Treated contact surfaces, e.g. coatings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/1073" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1073</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic bearings</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/108" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lubricants</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/1086" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1086</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>liquid metals</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/1093" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1093</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measures for preventing vibration</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J235/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling</text></title-part></class-title>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/1204" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1204</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of the anode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/1208" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1208</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of the bearing assembly</text></title-part></class-title></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/1212" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1212</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of the cathode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/1216" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1216</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of the vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/122" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of the window</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/1225" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1225</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by method</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/1229" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1229</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>employing layers with high emissivity</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J235/1233" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1233</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J235/1237" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1237</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Oxides</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J235/1241" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1241</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bonding layer to substrate</text></title-part></class-title></classification-item></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/1245" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1245</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Increasing emissive surface area</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J235/125" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with interdigitated fins or slots</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J235/1254" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1254</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with microscopic surface features</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/1258" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1258</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Placing objects in close proximity</text></title-part></class-title></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/1262" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1262</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circulating fluids</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J235/1266" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1266</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>flow being via moving conduit or shaft</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J235/127" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of flow</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J235/1275" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1275</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the fluid</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J235/1279" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1279</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid metals</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J235/1283" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1283</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in conjunction with extended surfaces (e.g. fins or ridges)</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J235/1287" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1287</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Heat pipes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/1291" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1291</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Thermal conductivity</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J235/1295" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/1295</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Contact between conducting bodies</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J235/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/161" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/161</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-stationary vessels</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/162" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/162</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/163" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/163</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>shaped for a particular application</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/164" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/164</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Small cross-section, e.g. for entering in a body cavity</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/165" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shielding arrangements</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/166" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/166</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>against electromagnetic radiation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/167" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/167</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>against thermal (heat) energy</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J235/168" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/168</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>against charged particles</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J235/18" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Windows, e.g. for X-ray transmission</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/183" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multi-layer structures</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J235/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for controlling gases within the X-ray tube</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J235/205" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2235/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gettering</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J237/00" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01J2237/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>For features of general interest which may be found in other types of discharge tubes, an indexing code corresponding to general schemes <class-ref scheme="cpc">H01J2201/00</class-ref> - <class-ref scheme="cpc">H01J2203/00</class-ref> is given, e.g. for cathodes, vessels, cooling means or the like</note-paragraph><note-paragraph>Same rules apply for manufacturing procedures (<class-ref scheme="cpc">H01J2209/00</class-ref>), unless really specific to the tube concerned.</note-paragraph><note-paragraph> The codes in this main group are grouped according to the following principle: <subnote><note-paragraph>details common to gas or plasma discharge of the above mentioned tubes: <class-ref scheme="cpc">H01J2237/00</class-ref> - <class-ref scheme="cpc">H01J2237/2487</class-ref></note-paragraph><note-paragraph>Imaging or analysing: <class-ref scheme="cpc">H01J2237/25</class-ref> - <class-ref scheme="cpc">H01J2237/2857</class-ref></note-paragraph><note-paragraph> particle beam processing: <class-ref scheme="cpc">H01J2237/30</class-ref> - <class-ref scheme="cpc">H01J2237/31798</class-ref></note-paragraph><note-paragraph> plasma processing: <class-ref scheme="cpc">H01J2237/32</class-ref> - <class-ref scheme="cpc">H01J2237/339</class-ref></note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/002" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling arrangements </text><reference><text>of objects being observed or treated <class-ref scheme="cpc">H01J2237/2001</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/004" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Charge control of objects or beams</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/0041" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0041</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Neutralising arrangements</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0042" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Deflection of neutralising particles</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0044" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0044</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of objects being observed or treated</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/0045" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using secondary electrons</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/0047" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0047</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electromagnetic radiations, e.g. UV, X-rays, light</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/0048" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0048</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Charging arrangements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/006" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>H01J2237/006</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Details of gas supplies, e.g. in an ion source, to a beam line, to a specimen or to a workpiece, </text><reference><text><class-ref scheme="cpc">H01J37/3244</class-ref> takes precedence; environmental cells for electron microscopes <class-ref scheme="cpc">H01J2237/2003</class-ref>; microscopes with environmental specimen chamber <class-ref scheme="cpc">H01J2237/2608</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/0203" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0203</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Protection arrangements</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0206" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0206</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Extinguishing, preventing or controlling unwanted discharges</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0209" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0209</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Avoiding or diminishing effects of eddy currents</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0213" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0213</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Avoiding deleterious effects due to interactions between particles and tube elements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/0216" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0216</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for avoiding or correcting vibration effects</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/022" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Avoiding or removing foreign or contaminating particles, debris or deposits on sample or tube</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0225" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0225</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Detecting or monitoring foreign particles</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/024" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Moving components not otherwise provided for </text><reference><text>diaphragms <class-ref scheme="cpc">H01J2237/0458</class-ref>; objects <class-ref scheme="cpc">H01J2237/202</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0245" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0245</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Moving whole optical system relatively to object</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/026" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shields</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0262" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0262</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electrostatic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0264" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0264</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>magnetic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0266" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0266</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electromagnetic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0268" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0268</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liner tubes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/028" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Particle traps</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/03" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting, supporting, spacing or insulating electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/032" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/032</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting or supporting</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/036" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/036</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spacing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/038" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/038</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Insulating</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for controlling the discharge</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/041" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam polarising means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/043" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam blanking</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0432" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0432</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>High speed and short duration</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0435" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0435</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multi-aperture</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/0437" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0437</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Semiconductor substrate</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/045" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diaphragms</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0451" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0451</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with fixed aperture</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/0453" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0453</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>multiple apertures</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0455" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0455</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with variable aperture</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0456" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0456</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supports</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/0458" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0458</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>movable, i.e. for changing between differently sized apertures</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/047" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Changing particle velocity</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0473" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0473</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>accelerating</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/04732" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/04732</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with magnetic means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/04735" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/04735</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with electrostatic means</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/04737" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/04737</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>radio-frequency quadrupole [RFQ]</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0475" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0475</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>decelerating</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/04753" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/04753</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with magnetic means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/04756" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/04756</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with electrostatic means</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/049" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/049</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Focusing means</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0492" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0492</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lens systems </text><reference><text>individual lenses <class-ref scheme="cpc">H01J2237/10</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/04922" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/04922</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electromagnetic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/04924" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/04924</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electrostatic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/04926" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/04926</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/04928" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/04928</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Telecentric systems</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/05" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for energy or mass analysis</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/053" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/053</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electrostatic</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0535" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0535</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mirror analyser</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/055" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/055</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>magnetic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/057" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/057</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Energy or mass filtering</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sources</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/061" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/061</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Construction</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/062" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reducing size of gun</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/063" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron sources</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/06308" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/06308</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Thermionic sources</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/06316" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/06316</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Schottky emission</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/06325" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/06325</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold-cathode sources</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/06333" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/06333</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Photo emission</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/06341" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/06341</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Field emission</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/0635" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0635</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple source, e.g. comb or array</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/06358" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/06358</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Secondary emission</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/06366" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/06366</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gas discharge electron sources</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/06375" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/06375</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangement of electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/06383" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/06383</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spin polarised electron sources</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/06391" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/06391</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Positron sources</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/065" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Source emittance characteristics</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0653" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0653</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Intensity</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0656" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0656</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Density</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/08" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ion sources</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0802" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0802</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Field ionization sources</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/0805" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0805</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid metal sources</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/0807" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0807</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gas field ion sources [GFIS]</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/081" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/081</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sputtering sources</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0812" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0812</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ionized cluster beam [ICB] sources</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0815" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0815</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methods of ionisation</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/0817" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0817</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Microwaves</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/082" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron beam</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0822" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0822</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple sources</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/0825" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0825</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for producing different ions simultaneously</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/0827" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0827</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for producing different ions sequentially</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/083" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam forming</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/0835" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/0835</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Variable cross-section or shape</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lenses</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/103" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by lens type</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1035" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1035</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Immersion lens</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electrostatic</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1202" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1202</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Associated circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1205" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1205</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Microlenses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1207" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1207</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Einzel lenses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/121" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by shape</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/1215" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1215</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Annular electrodes</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>magnetic</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1405" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1405</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional details</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/141" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/141</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coils </text><reference><text>superconducting <class-ref scheme="cpc">H01J2237/142</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/1415" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1415</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bores or yokes, i.e. magnetic circuit in general</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/142" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/142</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with superconducting coils</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/15" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for deflecting or directing discharge</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/1501" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1501</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam alignment means or procedures</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/1502" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1502</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical adjustments</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1503" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1503</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical scanning</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/1504" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1504</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Associated circuits</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/1505" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1505</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotating beam around optical axis</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/1506" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1506</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tilting or rocking beam around an axis substantially at an angle to optical axis</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1507" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1507</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>dynamically, e.g. to obtain same impinging angle on whole area</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/1508" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1508</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combined electrostatic-electromagnetic means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/151" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/151</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrostatic means</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1512" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1512</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Travelling wave deflectors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1514" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1514</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Prisms</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1516" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1516</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multipoles</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1518" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1518</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for X-Y scanning</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/152" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/152</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic means</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1523" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1523</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Prisms</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/1526" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1526</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>For X-Y scanning</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/153" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/153</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Correcting image defects, e.g. stigmators</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/1532" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1532</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Astigmatism</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/1534" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1534</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aberrations</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/1536" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1536</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Image distortions due to scanning</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/1538" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/1538</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Space charge (Boersch) effect compensation </text><reference><text>neutralising means <class-ref scheme="cpc">H01J2237/0041</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/16" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels </text><reference><text>liner tubes <class-ref scheme="cpc">H01J2237/0268</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/162" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/162</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Open vessel, i.e. one end sealed by object or workpiece</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/164" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/164</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Particle-permeable windows</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/166" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/166</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sealing means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vacuum control means</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/182" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Obtaining or maintaining desired pressure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/184" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/184</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vacuum locks</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/186" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Valves</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/188" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/188</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Differential pressure</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Positioning, supporting, modifying or maintaining the physical state of objects being observed or treated</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2001" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2001</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Maintaining constant desired temperature</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2002" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2002</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Controlling environment of sample</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2003" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2003</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Environmental cells</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2004" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2004</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Biological samples</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2005" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Seal mechanisms</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2006" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2006</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vacuum seals</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2007" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Holding mechanisms</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2008" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2008</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for studying electrical or magnetical properties of objects</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/201" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/201</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for mounting multiple objects</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/202" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/202</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Movement</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/20207" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20207</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tilt</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/20214" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20214</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/20221" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20221</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Translation</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/20228" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20228</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical X-Y scanning</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/20235" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20235</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Z movement or adjustment</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/20242" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20242</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Eucentric movement</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2025" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2025</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sensing velocity of translation or rotation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/20257" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20257</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic coupling</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/20264" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20264</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Piezoelectric devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/20271" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20271</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Temperature responsive devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/20278" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20278</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Motorised movement</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/20285" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20285</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>computer-controlled</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/20292" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/20292</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for position and/or orientation registration</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/204" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/204</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for introducing and/or outputting objects </text><reference><text>locks <class-ref scheme="cpc">H01J2237/184</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/206" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/206</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifying objects while observing</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2062" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical constraints</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2065" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Temperature variations </text><reference><text>maintaining constant desired temperature <class-ref scheme="cpc">H01J2237/2001</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2067" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2067</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Surface alteration</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/208" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/208</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Elements or methods for movement independent of sample stage for influencing or moving or contacting or transferring the sample or parts thereof, e.g. prober needles or transfer needles in FIB/SEM systems</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/21" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/21</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Focus adjustment </text><reference><text>lenses <class-ref scheme="cpc">H01J2237/10</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/213" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/213</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>during electron or ion beam welding or cutting</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/216" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/216</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Automatic focusing methods</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/22" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Treatment of data </text><reference><text>mixing signals <class-ref scheme="cpc">H01J2237/24495</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/221" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/221</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Image processing</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/223" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/223</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fourier techniques</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/225" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Displaying image using synthesised colours</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/226" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/226</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Image reconstruction</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/228" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/228</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Charged particle holography</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/244" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/244</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Detection characterized by the detecting means</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/24405" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24405</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Faraday cages</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2441" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2441</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Semiconductor detectors, e.g. diodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/24415" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24415</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>X-ray</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2442" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2442</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Energy-dispersive (Si-Li type) spectrometer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/24425" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24425</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Wavelength-dispersive spectrometer</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2443" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2443</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Scintillation detectors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/24435" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24435</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Microchannel plates</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2444" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2444</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron Multiplier</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/24445" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24445</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using avalanche in a gas</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2445" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2445</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Photon detectors for X-rays, light, e.g. photomultipliers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/24455" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24455</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transmitted particle detectors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2446" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2446</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Position sensitive detectors</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/24465" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24465</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sectored detectors, e.g. quadrants</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2447" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2447</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Imaging plates</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/24475" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24475</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Scattered electron detectors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2448" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2448</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Secondary particle detectors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/24485" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24485</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Energy spectrometers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2449" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2449</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Detector devices with moving charges in electric or magnetic fields</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/24495" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24495</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Signal processing, e.g. mixing of two or more signals</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/245" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Detection characterised by the variable being measured</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/24507" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24507</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Intensity, dose or other characteristics of particle beams or electromagnetic radiation</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/24514" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24514</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam diagnostics including control of the parameter or property diagnosed </text><reference><text><class-ref scheme="cpc">H01J2237/30472</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/24521" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24521</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam diameter</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/24528" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24528</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Direction of beam or parts thereof in view of the optical axis, e.g. beam angle, angular distribution, beam divergence, beam convergence or beam landing angle on sample or workpiece </text><reference><text>means for deflecting or directing discharge <class-ref scheme="cpc">H01J2237/15</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/24535" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24535</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam current</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/24542" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24542</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam profile</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2455" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2455</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Polarisation (electromagnetic beams)</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/24557" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24557</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spin polarisation (particles)</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/24564" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24564</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measurements of electric or magnetic variables, e.g. voltage, current, frequency</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/24571" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24571</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measurements of non-electric or non-magnetic variables</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/24578" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24578</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spatial variables, e.g. position, distance</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/24585" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24585</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other variables, e.g. energy, mass, velocity, time, temperature</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/24592" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/24592</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Inspection and quality control of devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/248" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/248</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Components associated with the control of the tube</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2482" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2482</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2485" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2485</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electric or electronic means</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2487" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2487</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using digital signal processors</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/25" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes for localised analysis using electron or ion beams</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2505" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2505</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by their application</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2511" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2511</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Auger spectrometers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2516" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2516</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Secondary particles mass or energy spectrometry</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2522" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2522</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of electrons (ESCA, XPS)</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2527" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2527</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ions [SIMS]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2533" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2533</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Neutrals [SNMS]</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2538" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2538</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Low energy electron microscopy [LEEM]</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2544" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2544</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diffraction [LEED]</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/255" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/255</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reflection diffraction [RHEED]</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2555" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2555</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Microprobes, i.e. particle-induced X-ray spectrometry</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2561" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2561</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electron</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2566" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2566</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>ion</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2572" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2572</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>proton</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2577" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2577</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>atomic</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2583" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2583</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using tunnel effects, e.g. STM, AFM</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2588" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2588</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lorenz microscopy (magnetic field measurement)</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2594" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2594</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measuring electric fields or potentials</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron or ion microscopes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2602" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2602</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2605" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2605</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating at elevated pressures, e.g. atmosphere</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2608" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2608</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with environmental specimen chamber </text><reference><text>environmental cells <class-ref scheme="cpc">H01J2237/2003</class-ref></text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2611" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2611</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Stereoscopic measurements and/or imaging</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2614" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2614</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Holography or phase contrast, phase related imaging in general, e.g. phase plates</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/2617" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-01-01" status="published"><classification-symbol>H01J2237/2617</classification-symbol><class-title date-revised="2017-01-01"><title-part><text>Comparison or superposition of transmission images</text></title-part><title-part><text>Moiré</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/262" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/262</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-scanning techniques</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2623" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2623</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Field-emission microscopes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2626" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2626</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pulsed source</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Scanning microscopes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2801" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2801</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2802" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2802</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transmission microscopes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2803" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2803</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the imaging method</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2804" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2804</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Scattered primary beam</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/2805" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2805</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Elastic scattering</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2806" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2806</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Secondary charged particle</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2807" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2807</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>X-rays</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2808" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2808</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodoluminescence</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2809" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2809</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the imaging problems involved</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/281" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/281</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bottom of trenches or holes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2811" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2811</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Large objects</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2812" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2812</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emission microscopes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2813" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2813</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the application</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2814" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2814</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measurement of surface topography</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/2815" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2815</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Depth profile</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/2816" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2816</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Length</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/2817" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2817</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pattern inspection</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2818" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2818</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Scanning tunnelling microscopes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/282" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/282</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determination of microscope properties</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2823" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2823</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resolution</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2826" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2826</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Calibration </text><reference><text>for object processing apparatus <class-ref scheme="cpc">H01J2237/30433</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/285" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emission microscopes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2852" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2852</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Auto-emission (i.e. field-emission)</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2855" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2855</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Photo-emission</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/2857" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/2857</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Particle bombardment induced emission</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron or ion beam tubes for processing objects</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/303" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/303</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron or ion optical systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/304" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/304</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Controlling tubes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/30405" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30405</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/30411" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30411</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using digital signal processors [DSP]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/30416" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30416</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Handling of data </text><reference><text>for lithography <class-ref scheme="cpc">H01J37/3174</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/30422" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30422</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Data compression</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/30427" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30427</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using neural networks or fuzzy logic</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/30433" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30433</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>System calibration </text><reference><text>for microscopes <class-ref scheme="cpc">H01J2237/2826</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/30438" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30438</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Registration</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/30444" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30444</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Calibration grids</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3045" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3045</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Deflection calibration </text><reference><text>deflecting in general <class-ref scheme="cpc">H01J2237/15</class-ref>; specific to material treating <class-ref scheme="cpc">H01J2237/30483</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/30455" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30455</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Correction during exposure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/30461" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30461</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>pre-calculated</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/30466" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30466</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Detecting endpoint of process </text><reference><text>for plasma apparatus <class-ref scheme="cpc">H01J37/32963</class-ref>, for sputtering apparatus <class-ref scheme="cpc">H01J37/3479</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/30472" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30472</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Controlling the beam</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/30477" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30477</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam diameter</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/30483" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30483</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Scanning</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/30488" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30488</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Raster scan</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/30494" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/30494</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vector scan</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/31" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Processing objects on a macro-scale</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3104" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3104</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Welding</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3109" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3109</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cutting</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3114" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3114</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Machining</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3118" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3118</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Drilling</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3123" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3123</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Casting</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3128" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3128</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Melting</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3132" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3132</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Evaporating</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3137" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3137</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Plasma-assisted co-operation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3142" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3142</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ion plating</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3146" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3146</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ion beam bombardment sputtering</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3151" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3151</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Etching</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3156" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3156</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Curing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/316" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/316</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Changing physical properties</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3165" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3165</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Changing chemical properties</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/317" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J2237/317</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Processing objects on a microscale</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/31701" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31701</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ion implantation</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31703" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31703</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dosimetry</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31705" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31705</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Impurity or contaminant control</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31706" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31706</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the area treated</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31708" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31708</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>unpatterned</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/3171" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3171</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>patterned</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J237/31711" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31711</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using mask</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J237/31713" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31713</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Focused ion beam</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/31732" definition-exists="true" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31732</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Depositing thin layers on selected microareas </text><reference><text>ion plating <class-ref scheme="cpc">H01J2237/3142</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31733" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31733</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using STM</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/31735" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31735</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Direct-write microstructures</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31737" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31737</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31738" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31738</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using STM</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3174" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3174</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Etching microareas</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31742" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31742</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for repairing masks</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31744" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31744</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>introducing gas in vicinity of workpiece</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31745" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31745</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for preparing specimen to be viewed in microscopes or analyzed in microanalysers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31747" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31747</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using STM</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/31749" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31749</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Focused ion beam</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/3175" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>H01J2237/3175</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lithography</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31752" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31752</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using particular beams or near-field effects, e.g. STM-like techniques</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31754" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31754</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electron beams</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31755" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31755</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ion beams</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31757" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31757</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>hybrid, i.e. charged particles and light, X-rays, plasma</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31759" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31759</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using near-field effects, e.g. STM</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31761" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31761</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Patterning strategy</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31762" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31762</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Computer and memory organisation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31764" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31764</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dividing into sub-patterns</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31766" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31766</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Continuous moving of wafer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31767" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31767</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Step and repeat</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31769" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31769</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Proximity effect correction</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31771" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31771</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using multiple exposure</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31772" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31772</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Flood beam</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31774" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31774</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multi-beam</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31776" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31776</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shaped beam</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31777" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31777</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by projection</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31779" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31779</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>from patterned photocathode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31781" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31781</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>from patterned cold cathode</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J237/31783" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31783</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>M-I-M cathode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J237/31784" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31784</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Semiconductor cathode</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J237/31786" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31786</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Field-emitting cathode</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31788" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31788</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>through mask</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31789" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31789</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reflection mask</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31791" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31791</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Scattering mask</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/31793" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31793</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Problems associated with lithography</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31794" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31794</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>affecting masks</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31796" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31796</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>affecting resists</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/31798" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/31798</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>detecting pattern defects </text><reference><text>with SEM <class-ref scheme="cpc">H01J2237/2817</class-ref>; correcting <class-ref scheme="cpc">H01J2237/31735</class-ref>, <class-ref scheme="cpc">H01J2237/3174</class-ref></text></reference></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J237/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Processing objects by plasma generation</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/327" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/327</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for generating the plasma</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J237/33" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/33</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the type of processing</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/332" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/332</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coating</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3321" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3321</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>CVD [Chemical Vapor Deposition]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3322" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3322</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Problems associated with coating</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/3323" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3323</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>uniformity</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/3325" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3325</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>large area</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/3326" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3326</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>high speed</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/3327" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3327</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coating high aspect ratio workpieces</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/3328" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3328</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>adhesion, stress, lift-off of deposited films</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/334" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/334</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Etching</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3341" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3341</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reactive etching</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3342" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3342</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resist stripping</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3343" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3343</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Problems associated with etching</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/3344" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3344</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>isotropy</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/3345" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3345</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>anisotropy</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/3346" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3346</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Selectivity</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/3347" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3347</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>bottom of holes or trenches</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J237/3348" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3348</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>control of ion bombardment energy</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/335" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/335</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cleaning</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3355" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3355</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Holes or apertures, i.e. inprinted circuit boards</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/336" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/336</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Changing physical properties of treated surfaces</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3365" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3365</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Plasma source implantation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/338" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/338</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Changing chemical properties of treated surfaces</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3382" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3382</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Polymerising</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3385" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3385</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carburising</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J237/3387" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/3387</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Nitriding</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J237/339" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2237/339</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Synthesising components</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="H01J261/00" date-revised="2013-01-01" status="published"><classification-symbol>H01J2261/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J261/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2261/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gas- or vapour-discharge lamps</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J261/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2261/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J261/38" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2261/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Devices for influencing the colour or wavelength of the light</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J261/385" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2261/385</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-chemical aspects of luminescent layers, e.g. thickness profile, shape and distribution of luminescent coatings</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J329/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron emission display panels, e.g. field emission display panels</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J329/002" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J329/005" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multi-directional displaying, i.e. with multiple display faces facing in different directions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J329/007" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vacuumless display panels, i.e. with phosphor directly applied to emitter without intermediate vacuum space</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J329/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes other than control electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathode electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/0402" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0402</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Thermionic cathodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/0405" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0405</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold cathodes other than those covered by <class-ref scheme="cpc">H01J2329/0407</class-ref> - <class-ref scheme="cpc">H01J2329/0492</class-ref></text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/0407" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0407</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Field emission cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/041" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the emitter shape</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0413" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J2329/0413</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Microengineered point emitters</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J329/0415" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0415</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>conical shaped, e.g. Spindt type</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J329/0418" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0418</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>needle shaped</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0421" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0421</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pillar shaped emitters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0423" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01J2329/0423</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Microengineered edge emitters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0426" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0426</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coatings on the emitter surface, e.g. with low work function materials</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0428" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0428</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fibres</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0431" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0431</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Nanotubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0434" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0434</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Particles</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0436" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0436</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Whiskers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/0439" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0439</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the emitter material</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0442" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0442</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Metals or metal alloys</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0444" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0444</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carbon types</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J329/0447" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0447</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diamond</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J329/0449" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0449</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Graphite</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J329/0452" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0452</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fullerenes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J329/0455" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0455</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carbon nanotubes (CNTs)</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J329/0457" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0457</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Amorphous carbon</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H01J329/046" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diamond-like carbon [DLC]</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0463" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0463</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Semiconductor materials</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0465" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0465</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carbides</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0468" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0468</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Nitrides</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0471" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0471</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Borides</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/0473" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0473</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Oxides</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/0476" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0476</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ferroelectric cathodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/0478" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0478</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Semiconductor cathodes, e.g. having PN junction layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/0481" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0481</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold cathodes having an electric field perpendicular to the surface thereof </text><reference><text><class-ref scheme="cpc">H01J2329/0407</class-ref> - <class-ref scheme="cpc">H01J2329/0478</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/0484" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0484</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Metal-Insulator-Metal [MIM] emission type cathodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/0486" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0486</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold cathodes having an electric field parallel to the surface thereof, e.g. thin film cathodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/0489" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0489</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Surface conduction emission type cathodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/0492" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0492</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold cathodes combined with other synergetic effects, e.g. secondary, photo- or thermal emission</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/0494" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0494</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit elements associated with the emitters by direct integration</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/0497" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/0497</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resistive members, e.g. resistive layers</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anode electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J329/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Luminescent screens</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the luminescent material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the binder or adhesive for securing the luminescent material to its support, e.g. substrate</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with protective, conductive or reflective layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shape or geometrical arrangement of the luminescent material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means associated with discontinuous arrangements of the luminescent material</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/323" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/323</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Black matrix</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/326" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/326</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Color filters structurally combined with the luminescent material</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J329/46" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements of electrodes and associated parts for generating or controlling the electron beams</text></title-part></class-title>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/4604" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4604</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control electrodes</text></title-part></class-title>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/4608" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4608</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gate electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/4613" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4613</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the form or structure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/4617" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4617</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shapes or dimensions of gate openings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/4621" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4621</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangement of gate openings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/4626" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4626</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Curved or extending upwardly</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/463" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/463</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/4634" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4634</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Relative position to the emitters, cathodes or substrates</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/4639" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4639</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Focusing electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/4643" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4643</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the form or structure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/4647" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4647</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shapes or dimensions of focusing electrode openings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/4652" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4652</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangement of focusing electrode openings</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/4656" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4656</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/466" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/466</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Relative position to the gate electrodes, emitters, cathodes or substrates</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J329/4665" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4665</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>In the same plane as the gate electrodes or cathodes</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/4669" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4669</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Insulation layers</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/4673" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4673</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for gate electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/4678" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4678</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for focusing electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/4682" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4682</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the shape</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/4686" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4686</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dimensions of openings</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/4691" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4691</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/4695" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/4695</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Potentials applied to the electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J329/86" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/86</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/8605" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/8605</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Front or back plates</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/861" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/861</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the shape</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/8615" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/8615</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/862" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/862</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frames</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/8625" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/8625</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spacing members</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/863" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/863</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the form or structure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/8635" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/8635</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a corrugated lateral surface</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/864" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/864</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/8645" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/8645</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with coatings on the lateral surfaces thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/865" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/865</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Connection of the spacing members to the substrates or electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/8655" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/8655</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Conductive or resistive layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/866" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/866</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adhesives</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/8665" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/8665</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spacer holding means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/867" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/867</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Seals between parts of vessels</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/8675" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/8675</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Seals between the frame and the front and/or back plate</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/868" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/868</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Passive shielding means of vessels</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/8685" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/8685</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Antistatic shielding</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/869" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/869</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electromagnetic shielding</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/8695" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/8695</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical shielding, e.g. against water or abrasion</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/88" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/88</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coatings on walls of the vessels </text><reference><text><class-ref scheme="cpc">H01J2329/18</class-ref>, <class-ref scheme="cpc">H01J2329/868</class-ref>, <class-ref scheme="cpc">H01J2329/89</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/89" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/89</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical components structurally combined with the vessel</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/892" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/892</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anti-reflection, anti-glare, viewing angle and contrast improving means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/895" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/895</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spectral filters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/897" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/897</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lenses</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J329/90" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Leading-in arrangements</text></title-part><title-part><text>seals therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J329/92" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/92</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means forming part of the display panel for the purpose of providing electrical connection to it</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J329/94" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/94</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for exhausting the vessel or maintaining vacuum within the vessel</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/941" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/941</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for exhausting the vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J329/943" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/943</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for maintaining vacuum within the vessel</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J329/945" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/945</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by gettering</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/946" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/946</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the position or form of the getter</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J329/948" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/948</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the material of the getter</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J329/96" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2329/96</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuit elements structurally associated with the display panels </text><reference><text><class-ref scheme="cpc">H01J2329/0494</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H01J893/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Discharge tubes and lamps</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0001" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0001</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes and electrode systems suitable for discharge tubes or lamps</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0002" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0002</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Construction arrangements of electrode systems</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0003" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0003</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anodes forming part of vessel walls</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0004" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0004</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anodes formed in central part</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0005" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fixing of electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0006" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0006</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J893/0007" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Machines for assembly</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0008" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0008</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supply leads</text></title-part><title-part><text>Electrode supports via rigid connection to vessel</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0009" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrode system pressing against vessel wall</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/001" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-constructive schematic arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0011" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0011</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-emitting electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0012" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0012</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional arrangements</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0013" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0013</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sealed electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0015" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0015</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-sealed electrodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0016" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Planar grids</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0017" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0017</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cylindrical, helical or annular grids</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0018" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bar or cage-like grids</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0019" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0019</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Chemical composition and manufacture</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/002" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>chemical</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J893/0021" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>carbon</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0022" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0022</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manufacture</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J893/0023" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0023</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>carbonising and other surface treatments</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J893/0024" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0024</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Planar grids</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J893/0025" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by winding wire upon a support</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0026" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0026</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Machines for manufacture of grids or anodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0027" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0027</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mitigation of temperature effects</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0029" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0029</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electron beam tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/003" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with plural electrode systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0031" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0031</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with material luminescing under electron bombardment</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0032" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0032</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with variable amplification factor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0033" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vacuum connection techniques applicable to discharge tubes and lamps</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0034" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0034</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamp bases</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0035" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0035</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>shaped as flat plates, in particular metallic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0036" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having wires, ribbons or tubes placed between two vessel walls and being perpendicular to at least one of said walls</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0037" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0037</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Solid sealing members other than lamp bases</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0038" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0038</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Direct connection between two insulating elements, in particular via glass material</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0039" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0039</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Glass-to-glass connection, e.g. by soldering</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/004" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Quartz-to-quartz connection</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0041" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0041</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Direct connection between insulating and metal elements, in particular via glass material</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0043" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0043</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Glass-to-metal or quartz-to-metal, e.g. by soldering</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0044" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0044</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Direct connection between two metal elements, in particular via material a connecting material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0045" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-solid connections, e.g. liquid or rubber</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0046" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0046</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lamp base with closure</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0047" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0047</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Closure other than lamp base</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0048" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0048</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with a main cathode</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0049" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0049</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal parts</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/005" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0051" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0051</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anode assemblies</text></title-part><title-part><text>screens for influencing the discharge</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0052" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0052</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anode supporting means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0053" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0053</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Leading in for anodes</text></title-part><title-part><text>Protecting means for anode supports</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0054" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0054</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0055" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0055</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Movable screens</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0056" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0056</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Parts inside tubes brought to incandescence by the discharge</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0058" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0058</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Grids</text></title-part><title-part><text>Auxiliary internal or external electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0059" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0059</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arc discharge tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/006" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with electron bombarded gas (e.g. with plasma filter)</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0061" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0061</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with discharge used as electron source</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0062" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with temperature ionized gas as electron source</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0063" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0063</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Plasma light sources</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0064" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0064</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with cold main electrodes (including cold cathodes)</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0065" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrode systems</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0066" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Construction, material, support, protection and temperature regulation of electrodes</text></title-part><title-part><text>Electrode cups</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0067" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0067</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrode assembly without control electrodes, e.g. including a screen</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0068" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0068</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>electrode assembly with control electrodes, e.g. including a screen</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0069" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0069</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes for displaying characters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/007" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sequential discharge tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0072" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0072</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Disassembly or repair of discharge tubes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0073" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0073</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Discharge tubes with liquid poolcathodes</text></title-part><title-part><text>constructional details</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0074" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0074</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodic cups</text></title-part><title-part><text>Screens</text></title-part><title-part><text>Reflectors</text></title-part><title-part><text>Filters</text></title-part><title-part><text>Windows</text></title-part><title-part><text>Protection against mercury deposition</text></title-part><title-part><text>Returning condensed electrode material to the cathodic cup</text></title-part><title-part><text>Liquid electrode level control</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0075" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodic cups</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J893/0076" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid electrode materials</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J893/0077" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0077</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cathodic cup construction</text></title-part><title-part><text>Cathodic spot control</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J893/0078" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0078</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting cathodic cups in the discharge tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J893/0079" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0079</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for limiting the cathodic spot movement</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J893/008" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for stabilising the cathodic spot</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H01J893/0081" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0082" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0082</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Returning condensed electrode material to the cathodic cup, e.g. including cleaning</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0083" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid electrode level control</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0084" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0084</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Protection against mercury deposition</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0086" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0086</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gas fill</text></title-part><title-part><text>Maintaining or maintaining desired pressure</text></title-part><title-part><text>Producing, introducing or replenishing gas or vapour during operation of the tube</text></title-part><title-part><text>Getters</text></title-part><title-part><text>Gas cleaning</text></title-part><title-part><text>Electrode cleaning</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0087" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0087</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Igniting means</text></title-part><title-part><text>Cathode spot maintaining or extinguishing means</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0088" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0088</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with at least a solid principal cathode and solid anodes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0089" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0089</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrode systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/009" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anode systems</text></title-part><title-part><text>Screens</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0091" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0091</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anode supporting means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0092" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anodic screens or grids</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H01J893/0093" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0093</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anodic arms</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H01J893/0094" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0094</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrode arrangements</text></title-part><title-part><text>Auxiliary electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0095" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0095</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tubes with exclusively liquid main electrodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H01J893/0096" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0096</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transport of discharge tube components during manufacture, e.g. wires, coils, lamps, contacts, etc.</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0097" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0097</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Incandescent wires of coils</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H01J893/0098" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01J2893/0098</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vessels</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></class-scheme> |