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788 lines
416 KiB
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788 lines
416 KiB
XML
<?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="H03H" definition-exists="true" date-revised="2018-08-01" status="published"><classification-symbol>H03H</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS</text></title-part><title-part><text>RESONATORS </text><reference><text>measuring, testing <class-ref scheme="cpc">G01R</class-ref>; arrangements for producing a reverberation or echo sound <class-ref scheme="cpc">G10K15/08</class-ref>; impedance networks or resonators consisting of distributed impedances, e.g. of the waveguide type, <class-ref scheme="cpc">H01P</class-ref>; control of amplification, e.g. bandwidth control of amplifiers, <class-ref scheme="cpc">H03G</class-ref>; tuning resonant circuits, e.g. tuning coupled resonant circuits, <class-ref scheme="cpc">H03J</class-ref>; networks for modifying the frequency characteristics of communication systems <class-ref scheme="cpc">H04B</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> : <subnote type="bullet"><note-paragraph>networks comprising lumped impedance elements;</note-paragraph><note-paragraph>networks comprising distributed impedance elements together with lumped impedance elements;</note-paragraph><note-paragraph>networks comprising electromechanical or electro-acoustic elements;</note-paragraph><note-paragraph>networks simulating reactances and comprising discharge tubes or semiconductor devices;</note-paragraph><note-paragraph>constructions of electromechanical resonators.</note-paragraph></subnote></note-paragraph><note-paragraph> In this subclass, the following expression is used with the meaning indicated: <subnote><note-paragraph>"passive elements" means resistors, capacitors, inductors, mutual inductors or diodes.</note-paragraph></subnote></note-paragraph><note-paragraph>Attention is drawn to the Notes following the titles of class <class-ref scheme="cpc">B81</class-ref> and subclass <class-ref scheme="cpc">B81B</class-ref> relating to "microstructural devices" and "microstructural systems".</note-paragraph><note-paragraph>In this subclass, main groups with a higher number take precedence.</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="H03H1/00" date-revised="2013-01-01" status="published"><classification-symbol>H03H1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H03H1/00" definition-exists="true" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network </text><reference><text>constructional details of electromechanical transducers <class-ref scheme="cpc">H03H9/00</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="H03H1/0007" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H1/0007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of radio frequency interference filters</text></CPC-specific-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="H03H1/0014" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2001/0014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Capacitor filters, i.e. capacitors whose parasitic inductance is of relevance to consider it as filter</text></CPC-specific-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="H03H1/0021" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2001/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03H1/0028" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2001/0028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>RFI filters with housing divided in two bodies</text></CPC-specific-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="H03H1/0035" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2001/0035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wound magnetic core</text></CPC-specific-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="H03H1/0042" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2001/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wound, ring or feed-through type capacitor</text></CPC-specific-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="H03H1/005" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2001/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wound, ring or feed-through type inductor</text></CPC-specific-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="H03H1/0057" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2001/0057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising magnetic material</text></CPC-specific-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="H03H1/0064" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2001/0064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising semiconductor material</text></CPC-specific-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="H03H1/0071" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2001/0071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising zig-zag inductor</text></CPC-specific-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="H03H1/0078" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2001/0078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising spiral inductor on a substrate</text></CPC-specific-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="H03H1/0085" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2001/0085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multilayer, e.g. LTCC, HTCC, green sheets </text><reference><text>inside PCB filters <class-ref scheme="cpc">H05K</class-ref></text></reference></CPC-specific-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="H03H1/0092" definition-exists="false" ipc-concordant="H03H1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2001/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inductor filters, i.e. inductors whose parasitic capacitance is of relevance to consider it as filter</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="H03H1/02" definition-exists="false" ipc-concordant="H03H1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of RC networks, e.g. integrated networks</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="H03H2/00" definition-exists="true" ipc-concordant="H03H2/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03H2/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Networks using elements or techniques not provided for in groups <class-ref scheme="cpc">H03H3/00</class-ref> - <class-ref scheme="cpc">H03H21/00</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="H03H2/001" definition-exists="false" ipc-concordant="H03H2/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising magnetostatic wave network elements</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="H03H2/003" definition-exists="false" ipc-concordant="H03H2/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising optical fibre network elements </text><reference><text>optical elements <u>per se</u> <class-ref scheme="cpc">G02B</class-ref>, <class-ref scheme="cpc">G02F</class-ref>; transmission systems using light waves <class-ref scheme="cpc">H04B10/00</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="H03H2/005" definition-exists="false" ipc-concordant="H03H2/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers</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="H03H2/006" definition-exists="false" ipc-concordant="H03H2/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmitter or amplifier output circuits</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="H03H2/008" definition-exists="false" ipc-concordant="H03H2/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Receiver or amplifier input 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="7" additional-only="false" sort-key="H03H3/00" definition-exists="true" ipc-concordant="H03H3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H3/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03H3/007" definition-exists="false" ipc-concordant="H03H3/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H3/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for the manufacture of electromechanical resonators or networks</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03H3/0071" definition-exists="false" ipc-concordant="H03H3/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of bulk acoustic wave and surface acoustic wave elements in the same process</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="H03H3/0072" definition-exists="false" ipc-concordant="H03H3/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03H3/0072</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>of microelectro-mechanical resonators or networks </text><reference><text>micromembranes or microbeams <class-ref scheme="cpc">B81B2203/01</class-ref>; manufacture of microstructural devices in general <class-ref scheme="cpc">B81C</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="H03H3/0073" definition-exists="false" ipc-concordant="H03H3/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H3/0073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integration with other electronic structures</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="H03H3/0075" definition-exists="false" ipc-concordant="H03H3/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03H3/0075</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Arrangements or methods specially adapted for testing microelecro-mechanical resonators or networks</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="H03H3/0076" definition-exists="false" ipc-concordant="H03H3/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H3/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for obtaining desired frequency or temperature coefficients</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="H03H3/0077" definition-exists="false" ipc-concordant="H03H3/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H3/0077</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by tuning of resonance frequency</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="H03H3/0078" definition-exists="false" ipc-concordant="H03H3/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H3/0078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving adjustment of the transducing gap</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="H03H3/013" definition-exists="false" ipc-concordant="H03H3/013" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H3/013</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for obtaining desired frequency or temperature coefficient </text><reference><CPC-specific-text><text><class-ref scheme="cpc">H03H3/0076</class-ref></text></CPC-specific-text><text> <class-ref scheme="cpc">H03H3/04</class-ref>, <class-ref scheme="cpc">H03H3/10</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="9" additional-only="false" sort-key="H03H3/02" definition-exists="false" ipc-concordant="H03H3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for the manufacture of piezo-electric or electrostrictive resonators or networks </text><reference><text><class-ref scheme="cpc">H03H3/08</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="H03H3/021" definition-exists="false" ipc-concordant="H03H3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the resonators or networks being of the air-gap type</text></CPC-specific-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="H03H3/022" definition-exists="false" ipc-concordant="H03H3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the resonators or networks being of the cantilever type</text></CPC-specific-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="H03H3/023" definition-exists="false" ipc-concordant="H03H3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the resonators or networks being of the membrane type</text></CPC-specific-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="H03H3/025" definition-exists="false" ipc-concordant="H03H3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the resonators or networks comprising an acoustic mirror</text></CPC-specific-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="H03H3/026" definition-exists="false" ipc-concordant="H03H3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the resonators or networks being of the tuning fork type</text></CPC-specific-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="H03H3/027" definition-exists="false" ipc-concordant="H03H3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03H2003/027</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>the resonators or networks being of the microelectro-mechanical [MEMS] type</text></CPC-specific-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="H03H3/028" definition-exists="false" ipc-concordant="H03H3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for obtaining desired values of other parameters</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="H03H3/04" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for obtaining desired frequency or temperature coefficient</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H3/0407" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Temperature coefficient</text></CPC-specific-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="H03H3/0414" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0414</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Resonance frequency</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03H3/0421" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0421</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modification of the thickness of an element</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H03H3/0428" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0428</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of an electrode</text></CPC-specific-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="H03H3/0435" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0435</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of a piezoelectric layer</text></CPC-specific-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="H03H3/0442" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0442</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of a non-piezoelectric layer</text></CPC-specific-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="H03H3/045" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modification of the area of an element</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H03H3/0457" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0457</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of an electrode</text></CPC-specific-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="H03H3/0464" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0464</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating on an additional circuit element, e.g. a passive circuit element connected to the resonator</text></CPC-specific-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="H03H3/0471" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0471</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of a plurality of resonators at different frequencies</text></CPC-specific-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="H03H3/0478" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0478</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a process for mass production</text></CPC-specific-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="H03H3/0485" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0485</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>during the manufacture of a cantilever</text></CPC-specific-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="H03H3/0492" definition-exists="false" ipc-concordant="H03H3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2003/0492</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>during the manufacture of a tuning-fork</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="H03H3/06" definition-exists="false" ipc-concordant="H03H3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for the manufacture of magnetostrictive resonators or networks</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="H03H3/08" definition-exists="false" ipc-concordant="H03H3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for the manufacture of resonators or networks using surface acoustic waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H3/10" definition-exists="false" ipc-concordant="H03H3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for obtaining desired frequency or temperature coefficient</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="H03H5/00" definition-exists="true" ipc-concordant="H03H5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H5/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One-port networks comprising only passive electrical elements as network components</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03H5/003" definition-exists="false" ipc-concordant="H03H5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H5/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising distributed impedance elements together with lumped impedance elements</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="H03H5/006" definition-exists="false" ipc-concordant="H03H5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H5/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising simultaneously tunable inductance and capacitance</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="H03H5/02" definition-exists="false" ipc-concordant="H03H5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>without voltage- or current-dependent elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03H5/10" definition-exists="false" ipc-concordant="H03H5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising at least one element with prescribed temperature coefficient</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="H03H5/12" definition-exists="false" ipc-concordant="H03H5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with at least one voltage- or current-dependent element</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="H03H7/00" definition-exists="true" ipc-concordant="H03H7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple-port networks comprising only passive electrical elements as network components </text><reference><text>receiver input circuits <class-ref scheme="cpc">H04B1/18</class-ref>; networks simulating a length of communication cable <class-ref scheme="cpc">H04B3/40</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="H03H7/002" definition-exists="false" ipc-concordant="H03H7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gyrators</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="H03H7/004" definition-exists="false" ipc-concordant="H03H7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Capacitive coupling circuits not otherwise provided for</text></CPC-specific-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="H03H7/006" definition-exists="false" ipc-concordant="H03H7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2007/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>MEMS</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="H03H7/008" definition-exists="false" ipc-concordant="H03H7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2007/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the MEMS being trimmable</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="H03H7/01" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency selective two-port networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03H7/0107" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/0107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Non-linear filters</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="H03H7/0115" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/0115</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising only inductors and capacitors </text><reference><text><class-ref scheme="cpc">H03H7/075</class-ref>, <class-ref scheme="cpc">H03H7/09</class-ref>, <class-ref scheme="cpc">H03H7/12</class-ref>, <class-ref scheme="cpc">H03H7/13</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="H03H7/0123" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/0123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising distributed impedance elements together with lumped impedance elements</text></CPC-specific-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="H03H7/013" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2007/013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Notch or bandstop filters</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="H03H7/0138" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/0138</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrical filters or coupling circuits</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="H03H7/0146" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/0146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coupling circuits between two tubes, not otherwise provided for</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="H03H7/0153" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/0153</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrical filters; Controlling 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="H03H7/0161" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/0161</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bandpass filters </text><reference><text><class-ref scheme="cpc">H03H7/12</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="11" additional-only="false" sort-key="H03H7/0169" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/0169</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Intermediate frequency filters</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="H03H7/0176" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/0176</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>witout magnetic core</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="H03H7/0184" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/0184</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ferromagnetic core</text></CPC-specific-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="H03H7/0192" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2007/0192</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Complex filters</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="H03H7/03" definition-exists="false" ipc-concordant="H03H7/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising means for compensation of loss</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="H03H7/06" definition-exists="false" ipc-concordant="H03H7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>including resistors </text><reference><text><class-ref scheme="cpc">H03H7/075</class-ref>, <class-ref scheme="cpc">H03H7/09</class-ref>, <class-ref scheme="cpc">H03H7/12</class-ref>, <class-ref scheme="cpc">H03H7/13</class-ref> take 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="H03H7/065" definition-exists="false" ipc-concordant="H03H7/065" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Parallel T-filters</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="H03H7/07" definition-exists="false" ipc-concordant="H03H7/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bridged T-filters</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="H03H7/075" definition-exists="false" ipc-concordant="H03H7/075" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/075</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ladder networks, e.g. electric wave filters</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="H03H7/09" definition-exists="false" ipc-concordant="H03H7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Filters comprising mutual inductance</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="H03H7/12" definition-exists="false" ipc-concordant="H03H7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency </text><reference><text><class-ref scheme="cpc">H03H7/09</class-ref> takes precedence; automatic control of bandwidth in amplifiers <class-ref scheme="cpc">H03G5/16</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="H03H7/13" definition-exists="false" ipc-concordant="H03H7/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electro-optic elements</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="H03H7/17" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H03H7/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structural details of sub-circuits of frequency selective networks</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="H03H7/1708" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/1708</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comprising bridging elements, i.e. elements in a series path without own reference to ground and spanning branching nodes of another series path </text><reference><text><class-ref scheme="cpc">H03H7/07</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="H03H7/1716" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/1716</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comprising foot-point elements</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="H03H7/1725" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/1725</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Element to ground being common to different shunt paths, i.e. Y-structure</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="H03H7/1733" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/1733</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Element between different shunt or branch paths </text><reference><text><class-ref scheme="cpc">H03H7/425</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="H03H7/1741" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03H7/1741</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Comprising typical LC combinations, irrespective of presence and location of additional resistors </text><reference><text>when resistors are present, also classify in <class-ref scheme="cpc">H03H7/06</class-ref> - <class-ref scheme="cpc">H03H7/07</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="H03H7/175" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/175</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Series LC in series path </text><reference><text><class-ref scheme="cpc">H03H7/1783</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="H03H7/1758" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/1758</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Series LC in shunt or branch path </text><reference><text><class-ref scheme="cpc">H03H7/1791</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="H03H7/1766" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/1766</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Parallel LC in series path </text><reference><text><class-ref scheme="cpc">H03H7/1783</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="H03H7/1775" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/1775</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Parallel LC in shunt or branch path </text><reference><text><class-ref scheme="cpc">H03H7/1791</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="H03H7/1783" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/1783</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combined LC in series path</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="H03H7/1791" definition-exists="false" ipc-concordant="H03H7/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/1791</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combined LC in shunt or branch path</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="H03H7/18" definition-exists="false" ipc-concordant="H03H7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Networks for phase shifting</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03H7/185" definition-exists="false" ipc-concordant="H03H7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising distributed impedance elements together with lumped impedance 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="H03H7/19" definition-exists="false" ipc-concordant="H03H7/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/19</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Two-port phase shifters providing a predetermined phase shift, e.g. "all-pass" filters</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="H03H7/20" definition-exists="false" ipc-concordant="H03H7/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Two-port phase shifters providing an adjustable phase shift</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="H03H7/21" definition-exists="false" ipc-concordant="H03H7/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/21</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>providing two or more phase shifted output signals, e.g. n-phase output</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="H03H7/24" definition-exists="false" ipc-concordant="H03H7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency- independent attenuators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03H7/25" definition-exists="false" ipc-concordant="H03H7/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising an element controlled by an electric or magnetic variable </text><reference><text><class-ref scheme="cpc">H03H7/27</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="H03H7/251" definition-exists="false" ipc-concordant="H03H7/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/251</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the element being a thermistor</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="H03H7/253" definition-exists="false" ipc-concordant="H03H7/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/253</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the element being a diode</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="H03H7/255" definition-exists="false" ipc-concordant="H03H7/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the element being a PIN diode</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="H03H7/256" definition-exists="false" ipc-concordant="H03H7/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/256</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the element being a VARACTOR diode</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="H03H7/258" definition-exists="false" ipc-concordant="H03H7/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/258</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a galvano-magnetic device</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="H03H7/27" definition-exists="false" ipc-concordant="H03H7/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/27</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising a photo-electric element</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="H03H7/30" definition-exists="false" ipc-concordant="H03H7/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Time-delay networks </text><CPC-specific-text><reference><text>analogue shift registers <class-ref scheme="cpc">G11C27/04</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="H03H7/32" definition-exists="false" ipc-concordant="H03H7/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with lumped inductance and capacitance</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H7/325" definition-exists="false" ipc-concordant="H03H7/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adjustable networks</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="H03H7/34" definition-exists="false" ipc-concordant="H03H7/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with lumped and distributed reactance</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H7/345" definition-exists="false" ipc-concordant="H03H7/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/345</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adjustable networks</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="H03H7/38" definition-exists="false" ipc-concordant="H03H7/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Impedance-matching networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03H7/383" definition-exists="false" ipc-concordant="H03H7/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/383</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising distributed impedance elements together with lumped impedance elements</text></CPC-specific-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="H03H7/386" definition-exists="false" ipc-concordant="H03H7/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2007/386</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple band impedance matching</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="H03H7/40" definition-exists="false" ipc-concordant="H03H7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Automatic matching of load impedance to source impedance</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="H03H7/42" definition-exists="false" ipc-concordant="H03H7/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Balance/unbalance networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03H7/422" definition-exists="false" ipc-concordant="H03H7/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising distributed impedance elements together with lumped impedance 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="H03H7/425" definition-exists="false" ipc-concordant="H03H7/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H03H7/425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Balance-balance networks</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="H03H7/427" definition-exists="false" ipc-concordant="H03H7/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-01-01" status="published"><classification-symbol>H03H7/427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Common-mode filters </text><reference><text><class-ref scheme="cpc">H02J3/01</class-ref> and <class-ref scheme="cpc">H02M1/126</class-ref> takes precedence</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="H03H7/46" definition-exists="false" ipc-concordant="H03H7/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source </text><reference><text>for use in multiplex transmission systems <class-ref scheme="cpc">H04J1/00</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="H03H7/461" definition-exists="false" ipc-concordant="H03H7/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/461</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>particularly adapted for use in common antenna systems</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="H03H7/463" definition-exists="false" ipc-concordant="H03H7/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Duplexers</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="H03H7/465" definition-exists="false" ipc-concordant="H03H7/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/465</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having variable circuit topology, e.g. including switches</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="H03H7/466" definition-exists="false" ipc-concordant="H03H7/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>particularly adapted as input circuit for receivers</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="H03H7/468" definition-exists="false" ipc-concordant="H03H7/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/468</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>particularly adapted as coupling circuit between transmitters and antennas</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="H03H7/48" definition-exists="false" ipc-concordant="H03H7/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source </text><reference><text>phase shifters providing two or more output signals <class-ref scheme="cpc">H03H7/21</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="H03H7/482" definition-exists="false" ipc-concordant="H03H7/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/482</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>particularly adapted for use in common antenna systems</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="H03H7/485" definition-exists="false" ipc-concordant="H03H7/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/485</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>particularly adapted as input circuit for receivers</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="H03H7/487" definition-exists="false" ipc-concordant="H03H7/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/487</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>particularly adapted as coupling circuit between transmitters and antennas</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="H03H7/52" definition-exists="false" ipc-concordant="H03H7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One-way transmission networks, i.e. unilines</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="H03H7/54" definition-exists="false" ipc-concordant="H03H7/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H7/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modifications of networks to reduce influence of variations of temperature</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="H03H9/00" definition-exists="true" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-02-01" status="published"><classification-symbol>H03H9/00</classification-symbol><class-title date-revised="2023-02-01"><title-part><text>Networks comprising electromechanical or electro-acoustic devices</text></title-part><title-part><text>Electromechanical resonators </text><reference><text>making single crystals <class-ref scheme="cpc">C30B</class-ref>; selection of materials thereof <class-ref scheme="cpc">H01L</class-ref>; electromechanical transducers <class-ref scheme="cpc">H04R</class-ref>; piezo-electric, electrostrictive or magnetostrictive devices <u>per se</u> <class-ref scheme="cpc">H10N30/00</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="H03H9/0004" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Impedance-matching networks </text><reference><text><class-ref scheme="cpc">H03H9/145</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="9" additional-only="false" sort-key="H03H9/0009" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using surface acoustic wave devices</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="H03H9/0014" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using bulk acoustic wave devices</text></CPC-specific-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="H03H9/0019" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/0019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Surface acoustic wave multichip</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="H03H9/0023" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Balance-unbalance or balance-balance networks</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="H03H9/0028" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using surface acoustic wave devices</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="H03H9/0033" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having one acoustic track only</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="H03H9/0038" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the balanced terminals being on the same side of the track</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="H03H9/0042" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the balanced terminals being on opposite sides of the track</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="H03H9/0047" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having two acoustic tracks </text><reference><text><class-ref scheme="cpc">H03H9/008</class-ref>, <class-ref scheme="cpc">H03H9/0085</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="H03H9/0052" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>being electrically cascaded</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="H03H9/0057" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the balanced terminals being on the same side of the tracks</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="H03H9/0061" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the balanced terminals being on opposite sides of the tracks</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="H03H9/0066" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>being electrically parallel</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="H03H9/0071" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the balanced terminals being on the same side of the tracks</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="H03H9/0076" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the balanced terminals being on opposite sides of the tracks</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="H03H9/008" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having three acoustic tracks </text><reference><text><class-ref scheme="cpc">H03H9/0085</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="H03H9/0085" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having four acoustic tracks</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="H03H9/009" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lattice 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="9" additional-only="false" sort-key="H03H9/0095" definition-exists="false" ipc-concordant="H03H9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using bulk acoustic wave 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="8" additional-only="false" sort-key="H03H9/02" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02</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="H03H9/02007" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of bulk acoustic wave devices</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="H03H9/02015" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Characteristics of piezoelectric layers, e.g. cutting angles</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="H03H9/02023" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of quartz</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="H03H9/02031" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of ceramic</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="H03H9/02039" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02039</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of a material from the crystal group 32, e.g. langasite, langatate, langanite</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="H03H9/02047" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Treatment of substrates</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="H03H9/02055" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the surface including the back surface</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="H03H9/02062" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details relating to the vibration mode</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="H03H9/0207" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0207</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the vibration mode being harmonic</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="H03H9/02078" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the vibration mode being overmoded</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="H03H9/02086" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for compensation or elimination of undesirable effects</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="H03H9/02094" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02094</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of adherence</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="H03H9/02102" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of temperature influence </text><reference><text>cutting angles <class-ref scheme="cpc">H03H9/02015</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="H03H9/0211" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0211</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of 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="H03H9/02118" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02118</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of lateral leakage between adjacent resonators</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="H03H9/02125" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of parasitic elements</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="H03H9/02133" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02133</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of stress</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="H03H9/02141" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02141</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of electric discharge due to pyroelectricity</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="H03H9/02149" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02149</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of ageing changes of characteristics, e.g. electro-acousto-migration</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="H03H9/02157" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02157</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dimensional parameters, e.g. ratio between two dimension parameters, length, width or thickness</text></CPC-specific-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="H03H9/02165" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tuning</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03H9/02173" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02173</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of film bulk acoustic resonators [FBAR]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H9/02181" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02181</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by application of heat from a heat source</text></CPC-specific-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="H03H9/02188" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02188</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrically tuning</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03H9/02196" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02196</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating on the FBAR element, e.g. by direct application of a tuning DC voltage</text></CPC-specific-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="H03H9/02204" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02204</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating on an additional circuit element, e.g. applying a tuning DC voltage to a passive circuit element connected to the resonator</text></CPC-specific-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="H03H9/02212" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02212</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Magnetically tuning</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="H03H9/0222" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of interface-acoustic, boundary, pseudo-acoustic or Stonely wave devices</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="H03H9/02228" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Guided bulk acoustic wave devices or Lamb wave devices having interdigital transducers situated in parallel planes on either side of a piezoelectric layer</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="H03H9/02236" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of surface skimming bulk wave devices</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="H03H9/02244" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03H9/02244</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>of microelectro-mechanical resonators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03H9/02251" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02251</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Design</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="H03H9/02259" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02259</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Driving or detection means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H9/02267" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02267</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having dimensions of atomic scale, e.g. involving electron transfer across vibration gap</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="H03H9/02275" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comb electrodes</text></CPC-specific-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="H03H9/02283" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vibrating means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H9/02291" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02291</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Beams</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03H9/02299" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02299</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comb-like, i.e. the beam comprising a plurality of fingers or protrusions along its length</text></CPC-specific-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="H03H9/02307" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02307</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dog-bone-like structure, i.e. the elongated part of the "bone" is doubly clamped</text></CPC-specific-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="H03H9/02314" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02314</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>forming part of a transistor structure</text></CPC-specific-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="H03H9/02322" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02322</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></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H9/0233" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/0233</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising perforations</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="H03H9/02338" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02338</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Suspension means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H9/02346" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02346</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Anchors for ring resonators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03H9/02354" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02354</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applied along the periphery, e.g. at nodal points of the ring</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="H03H9/02362" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02362</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Folded-flexure</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03H9/0237" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/0237</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>applied at the center</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="H03H9/02377" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02377</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Symmetric folded-flexure</text></CPC-specific-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="H03H9/02385" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02385</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Anchors for square resonators, i.e. resonators comprising a square vibrating membrane</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="H03H9/02393" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02393</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Post-fabrication trimming of parameters, e.g. resonance frequency, Q factor</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="H03H9/02401" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02401</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by annealing</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="H03H9/02409" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02409</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by application of a DC-bias voltage </text><reference><text><class-ref scheme="cpc">H03H9/02417</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="H03H9/02417" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02417</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving adjustment of the transducing gap</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="H03H9/02425" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by electrostatically pulling the beam</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="H03H9/02433" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for compensation or elimination of undesired effects</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H9/0244" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/0244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Anchor loss</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="H03H9/02448" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02448</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of temperature influence</text></CPC-specific-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="H03H9/02456" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02456</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Parasitic elements or effects, e.g. parasitic capacitive coupling between input and output</text></CPC-specific-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="H03H9/02464" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02464</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pull-in</text></CPC-specific-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="H03H9/02472" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stiction</text></CPC-specific-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="H03H9/0248" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/0248</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Strain</text></CPC-specific-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="H03H9/02488" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02488</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vibration modes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H9/02496" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02496</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Horizontal, i.e. parallel to the substrate plane</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03H9/02503" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02503</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Breath-like, e.g. Lam? mode, wine-glass mode</text></CPC-specific-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="H03H9/02511" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02511</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vertical, i.e. perpendicular to the substrate plane</text></CPC-specific-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="H03H9/02519" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02519</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Torsional</text></CPC-specific-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="H03H9/02527" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/02527</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combined</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="H03H9/02535" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02535</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of surface acoustic wave devices</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="H03H9/02543" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02543</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Characteristics of substrate, e.g. cutting angles</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="H03H9/02551" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02551</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of quartz substrates</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="H03H9/02559" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02559</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of lithium niobate or lithium-tantalate substrates</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="H03H9/02566" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02566</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of semiconductor substrates</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="H03H9/02574" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02574</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of combined substrates, multilayered substrates, piezo-electrical layers on not-piezo- electrical 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="H03H9/02582" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02582</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of diamond substrates</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="H03H9/0259" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0259</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of langasite substrates</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="H03H9/02598" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02598</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of langatate substrates</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="H03H9/02606" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02606</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of langanite substrates</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="H03H9/02614" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02614</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Treatment of substrates, e.g. curved, spherical, cylindrical substrates ensuring closed round-about circuits for the acoustical waves</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="H03H9/02622" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02622</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the surface, including back surface</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="H03H9/02629" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02629</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the edges</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="H03H9/02637" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02637</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details concerning reflective or coupling arrays</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="H03H9/02645" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02645</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Waffle-iron or dot arrays</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="H03H9/02653" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02653</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grooves or arrays buried in the substrate</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="H03H9/02661" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02661</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>being located inside the interdigital transducers</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="H03H9/02669" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02669</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Edge reflection structures, i.e. resonating structures without metallic reflectors, e.g. Bleustein-Gulyaev-Shimizu [BGS], shear horizontal [SH], shear transverse [ST], Love waves devices</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="H03H9/02677" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02677</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having specially shaped edges, e.g. stepped, U-shaped edges</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="H03H9/02685" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grating lines having particular arrangements</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="H03H9/02692" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02692</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arched grating lines</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="H03H9/027" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>U-shaped grating lines</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="H03H9/02708" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02708</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shifted grating lines</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="H03H9/02716" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02716</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tilted, fan shaped or slanted grating lines</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="H03H9/02724" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02724</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comb like grating lines</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="H03H9/02732" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02732</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bilateral comb like grating lines</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="H03H9/0274" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0274</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Intra-transducers grating lines</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="H03H9/02748" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02748</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dog-legged reflectors</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="H03H9/02755" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02755</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Meandering floating or grounded grating lines</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="H03H9/02763" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02763</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Left and right side electrically coupled 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="H03H9/02771" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02771</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reflector banks</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="H03H9/02779" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02779</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Continuous surface reflective arrays</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="H03H9/02787" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02787</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having wave guide like arrangements</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="H03H9/02795" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02795</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-strip couplers as track changers</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="H03H9/02803" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02803</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Weighted reflective structures</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="H03H9/02811" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02811</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Chirped reflective or coupling arrays</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="H03H9/02818" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02818</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for compensation or elimination of undesirable effects</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="H03H9/02826" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of adherence</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="H03H9/02834" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02834</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of temperature influence </text><reference><text>cut angles <class-ref scheme="cpc">H03H9/02543</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="H03H9/02842" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02842</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of reflections </text><reference><text><class-ref scheme="cpc">H03H9/6406</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="H03H9/0285" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of triple transit echo</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="H03H9/02858" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02858</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of wave front distortion</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="H03H9/02866" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of bulk wave excitation and 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="H03H9/02874" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02874</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of direct coupling between input and output transducers</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="H03H9/02881" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02881</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of diffraction of wave 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="H03H9/02889" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02889</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of influence of mass loading</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="H03H9/02897" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02897</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of strain or mechanical damage, e.g. strain due to bending influence</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="H03H9/02905" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02905</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Measures for separating propagation paths on 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="H03H9/02913" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02913</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Measures for shielding against electromagnetic fields </text><reference><text>shielding of electrical components in general <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="11" additional-only="false" sort-key="H03H9/02921" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02921</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Measures for preventing electric discharge due to pyroelectricity</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="H03H9/02929" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02929</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of ageing changes of characteristics, e.g. electro-acousto-migration</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="H03H9/02937" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02937</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of chemical damage, e.g. corrosion</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="H03H9/02944" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02944</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of ohmic loss</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="H03H9/02952" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02952</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of parasitic capacitance</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="H03H9/0296" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0296</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Surface acoustic wave [SAW] devices having both acoustic and non-acoustic properties</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="H03H9/02968" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02968</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with optical devices </text><reference><text>mounting in enclosures <class-ref scheme="cpc">H03H9/12</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="11" additional-only="false" sort-key="H03H9/02976" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02976</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with semiconductor 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="H03H9/02984" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02984</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection measures against damaging</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="H03H9/02992" definition-exists="false" ipc-concordant="H03H9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/02992</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of bus bars, contact pads or other electrical connections for finger 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="H03H9/05" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Holders</text></title-part><title-part><text>Supports</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H9/0504" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0504</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for bulk acoustic wave devices</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="H03H9/0509" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0509</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of adhesive elements</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="H03H9/0514" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0514</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of mounting pads or bumps</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="H03H9/0519" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0519</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for cantilever </text><reference><text><class-ref scheme="cpc">H03H9/1021</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="12" additional-only="false" sort-key="H03H9/0523" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0523</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for flip-chip mounting</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="H03H9/0528" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0528</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of clips</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="H03H9/0533" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0533</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of wire</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="H03H9/0538" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0538</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional combinations of supports or holders with electromechanical or other electronic elements</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="H03H9/0542" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0542</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of a lateral arrangement </text><reference><text><class-ref scheme="cpc">H03H9/0566</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="H03H9/0547" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0547</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of a vertical arrangement </text><reference><text><class-ref scheme="cpc">H03H9/0566</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="H03H9/0552" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0552</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the device and the other elements being mounted on opposite sides of a common substrate</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="H03H9/0557" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0557</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the other elements being buried in the substrate</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="H03H9/0561" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0561</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of a multilayered structure</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="H03H9/0566" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0566</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for duplexers</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="H03H9/0571" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0571</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including bulk acoustic wave [BAW] devices</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="H03H9/0576" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0576</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including surface acoustic wave [SAW] devices</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="H03H9/058" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for surface acoustic wave devices</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="H03H9/0585" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0585</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of an adhesive layer</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="H03H9/059" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/059</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of mounting pads or bumps</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="H03H9/0595" definition-exists="false" ipc-concordant="H03H9/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/0595</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the holder support and resonator being formed in one body</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="H03H9/08" definition-exists="false" ipc-concordant="H03H9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Holders with means for regulating temperature</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="H03H9/09" definition-exists="false" ipc-concordant="H03H9/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Elastic or damping supports</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="H03H9/10" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting in enclosures </text><CPC-specific-text><reference><text>constructional combinations of enclosure with electromechanical and other electronic elements <class-ref scheme="cpc">H03H9/0538</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="H03H9/1007" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for bulk acoustic wave [BAW] devices</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="H03H9/1014" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the BAW device</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="H03H9/1021" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the BAW device being of the cantilever type</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="H03H9/1028" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the BAW device being held between spring terminals</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="H03H9/1035" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the enclosure being defined by two sealing substrates sandwiching the piezoelectric layer of the BAW device</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="H03H9/1042" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the enclosure being defined by a housing formed by a cavity in a resin</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="H03H9/105" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the enclosure being defined by a cover cap mounted on an element forming part of the BAW device</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="H03H9/1057" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03H9/1057</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>for microelectro-mechanical devices</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="H03H9/1064" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for surface acoustic wave [SAW] devices</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="H03H9/1071" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the SAW device</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="H03H9/1078" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the enclosure being defined by a foil covering the non-active sides of the SAW device</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="H03H9/1085" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the enclosure being defined by a non-uniform sealing mass covering the non-active sides of the BAW device</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="H03H9/1092" definition-exists="false" ipc-concordant="H03H9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the enclosure being defined by a cover cap mounted on an element forming part of the surface acoustic wave [SAW] device on the side of the IDT's</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="H03H9/12" definition-exists="false" ipc-concordant="H03H9/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for networks with interaction of optical and acoustic waves</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="H03H9/125" definition-exists="false" ipc-concordant="H03H9/125" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Driving means, e.g. electrodes, coils</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H9/13" definition-exists="false" ipc-concordant="H03H9/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for networks consisting of piezo-electric or electrostrictive materials </text><reference><text><class-ref scheme="cpc">H03H9/145</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="H03H9/131" definition-exists="false" ipc-concordant="H03H9/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/131</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of a multilayered structure</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="H03H9/132" definition-exists="false" ipc-concordant="H03H9/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/132</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterized by a particular 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="H03H9/133" definition-exists="false" ipc-concordant="H03H9/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/133</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for electromechanical delay lines or 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="10" additional-only="false" sort-key="H03H9/135" definition-exists="false" ipc-concordant="H03H9/135" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/135</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for networks consisting of magnetostrictive materials </text><reference><text><class-ref scheme="cpc">H03H9/145</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="H03H9/145" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for networks using surface acoustic waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03H9/14502" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14502</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Surface acoustic wave [SAW] transducers for a particular purpose</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="H03H9/14505" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14505</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Unidirectional SAW transducers</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="H03H9/14508" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14508</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polyphase SAW transducers</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="H03H9/14511" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14511</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>SAW transducers for non-piezoelectric substrates</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="H03H9/14514" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14514</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Broad band transducers</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="H03H9/14517" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14517</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for weighting</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="H03H9/1452" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1452</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by finger overlap length, apodisation</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="H03H9/14523" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14523</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Capacitive tap weighted transducers</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="H03H9/14526" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14526</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Finger withdrawal</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="H03H9/14529" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14529</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distributed tap</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="H03H9/14532" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14532</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Series weighting; Transverse weighting</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="H03H9/14535" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14535</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Position weighting</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="H03H9/14538" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14538</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Formation</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="H03H9/14541" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14541</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multilayer finger or busbar electrode</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="H03H9/14544" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14544</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transducers of particular shape or position </text><reference><text>weighting <class-ref scheme="cpc">H03H9/14517</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="H03H9/14547" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14547</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fan shaped; Tilted; Shifted; Slanted; Tapered; Arched; Stepped finger transducers</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="H03H9/1455" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>constituted of N parallel or series transducers</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="H03H9/14552" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14552</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising split fingers</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="H03H9/14555" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14555</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Chirped transducers </text><reference><text><class-ref scheme="cpc">H03H9/6406</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="12" additional-only="false" sort-key="H03H9/14558" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14558</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Slanted, tapered or fan shaped transducers </text><reference><text><class-ref scheme="cpc">H03H9/14561</class-ref>, <class-ref scheme="cpc">H03H9/14564</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="12" additional-only="false" sort-key="H03H9/14561" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14561</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arched, curved or ring shaped transducers</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="H03H9/14564" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14564</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shifted fingers transducers</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="H03H9/14567" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14567</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stepped-fan shaped transducers</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="H03H9/1457" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/1457</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transducers having different finger widths</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="H03H9/14573" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14573</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrow type transducers</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="H03H9/14576" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14576</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transducers whereby only the last fingers have different characteristics with respect to the other fingers, e.g. different shape, thickness or material, split finger</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="H03H9/14579" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14579</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the last fingers having a different shape</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="H03H9/14582" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14582</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the last fingers having a different pitch</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="H03H9/14585" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14585</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the last fingers being split</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="H03H9/14588" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14588</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Horizontally-split transducers</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="H03H9/14591" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14591</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vertically-split transducers</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="H03H9/14594" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14594</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plan-rotated or plan-tilted transducers</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="H03H9/14597" definition-exists="false" ipc-concordant="H03H9/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/14597</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Matching SAW transducers to external electrical circuits</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="H03H9/15" definition-exists="false" ipc-concordant="H03H9/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional features of resonators consisting of piezo-electric or electrostrictive material </text><reference><text><class-ref scheme="cpc">H03H9/25</class-ref> takes precedence</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="H03H9/155" definition-exists="false" ipc-concordant="H03H9/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/155</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using MEMS techniques</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="H03H9/17" definition-exists="false" ipc-concordant="H03H9/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a single resonator </text><reference><text>crystal tuning forks <class-ref scheme="cpc">H03H9/21</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="H03H9/171" definition-exists="false" ipc-concordant="H03H9/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/171</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>implemented with thin-film techniques, i.e. of the film bulk acoustic resonator [FBAR] type</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="H03H9/172" definition-exists="false" ipc-concordant="H03H9/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/172</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for mounting on a substrate, i.e. means constituting the material interface confining the waves to a volume</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="H03H9/173" definition-exists="false" ipc-concordant="H03H9/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/173</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Air-gaps</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="H03H9/174" definition-exists="false" ipc-concordant="H03H9/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/174</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Membranes</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="H03H9/175" definition-exists="false" ipc-concordant="H03H9/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/175</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Acoustic mirrors</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="H03H9/176" definition-exists="false" ipc-concordant="H03H9/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/176</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of ceramic material </text><reference><text><class-ref scheme="cpc">H03H9/177</class-ref>, <class-ref scheme="cpc">H03H9/178</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="H03H9/177" definition-exists="false" ipc-concordant="H03H9/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/177</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the energy-trap type</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="H03H9/178" definition-exists="false" ipc-concordant="H03H9/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/178</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of a laminated structure of multiple piezoelectric layers with inner 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="H03H9/19" definition-exists="false" ipc-concordant="H03H9/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/19</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>consisting of quartz</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="H03H9/205" definition-exists="true" ipc-concordant="H03H9/205" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having multiple resonators </text><reference><text>crystal tuning forks <class-ref scheme="cpc">H03H9/21</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="H03H9/21" definition-exists="false" ipc-concordant="H03H9/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/21</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Crystal tuning forks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H9/215" definition-exists="false" ipc-concordant="H03H9/215" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/215</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>consisting of quartz</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="H03H9/22" definition-exists="false" ipc-concordant="H03H9/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional features of resonators consisting of magnetostrictive material</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="H03H9/24" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional features of resonators of material which is not piezo-electric, electrostrictive, or magnetostrictive</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03H9/2405" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03H9/2405</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>of microelectro-mechanical resonators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03H9/241" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/241</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bulk-mode MEMS resonators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H9/2415" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/2415</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with concave shape [CBAR]</text></CPC-specific-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="H03H9/2421" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/2421</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with I shape [IBAR]</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="H03H9/2426" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with other electronic elements</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="H03H9/2431" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2431</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ring resonators</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="H03H9/2436" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2436</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disk resonators</text></CPC-specific-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="H03H9/2442" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2009/2442</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Square resonators</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="H03H9/2447" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2447</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Beam resonators </text><reference><text><class-ref scheme="cpc">H03H9/2468</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="H03H9/2452" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2452</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Free-free beam resonators</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="H03H9/2457" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2457</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Clamped-free beam resonators</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="H03H9/2463" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Clamped-clamped beam resonators</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="H03H9/2468" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2468</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tuning fork resonators</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="H03H9/2473" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2473</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Double-Ended Tuning Fork [DETF] resonators</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="H03H9/2478" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2478</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Single-Ended Tuning Fork resonators</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="H03H9/2484" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2484</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with two fork tines, e.g. Y-beam cantilever</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="H03H9/2489" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2489</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with more than two fork tines</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="H03H9/2494" definition-exists="false" ipc-concordant="H03H9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/2494</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>H-shaped, i.e. two tuning forks with common base</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="H03H9/25" definition-exists="false" ipc-concordant="H03H9/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional features of resonators using surface acoustic waves </text><CPC-specific-text><reference><text>devices for manipulating acoustic surface waves in general <class-ref scheme="cpc">G10K11/36</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="H03H9/30" definition-exists="false" ipc-concordant="H03H9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Time-delay networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03H9/36" definition-exists="false" ipc-concordant="H03H9/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with non-adjustable delay time </text><reference><text><class-ref scheme="cpc">H03H9/40</class-ref>, <class-ref scheme="cpc">H03H9/42</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="9" additional-only="false" sort-key="H03H9/38" definition-exists="false" ipc-concordant="H03H9/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with adjustable delay time </text><reference><text><class-ref scheme="cpc">H03H9/40</class-ref>, <class-ref scheme="cpc">H03H9/42</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="9" additional-only="false" sort-key="H03H9/40" definition-exists="false" ipc-concordant="H03H9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency dependent delay lines, e.g. dispersive delay lines </text><reference><text><class-ref scheme="cpc">H03H9/42</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="H03H9/42" definition-exists="false" ipc-concordant="H03H9/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using surface acoustic waves </text><CPC-specific-text><reference><text>devices for manipulating acoustic surface waves in general <class-ref scheme="cpc">G10K11/36</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="H03H9/423" definition-exists="false" ipc-concordant="H03H9/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with adjustable delay time</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="H03H9/426" definition-exists="false" ipc-concordant="H03H9/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Magneto-elastic surface waves</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="H03H9/44" definition-exists="false" ipc-concordant="H03H9/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency dependent delay lines, e.g. dispersive delay lines</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="H03H9/46" definition-exists="false" ipc-concordant="H03H9/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Filters </text><reference><text>multiple-port electromechanical filters <class-ref scheme="cpc">H03H9/70</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="H03H9/462" definition-exists="false" ipc-concordant="H03H9/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03H9/462</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Microelectro-mechanical filters</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="H03H9/465" definition-exists="false" ipc-concordant="H03H9/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/465</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with other electronic elements</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="H03H9/467" definition-exists="false" ipc-concordant="H03H9/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/467</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Post-fabrication trimming of parameters, e.g. center 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="9" additional-only="false" sort-key="H03H9/48" definition-exists="false" ipc-concordant="H03H9/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coupling means therefor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H9/485" definition-exists="false" ipc-concordant="H03H9/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03H9/485</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>for microelectro-mechanical filters</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="H03H9/50" definition-exists="false" ipc-concordant="H03H9/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical coupling means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03H9/505" definition-exists="false" ipc-concordant="H03H9/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03H9/505</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>for microelectro-mechanical 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="10" additional-only="false" sort-key="H03H9/52" definition-exists="false" ipc-concordant="H03H9/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electric coupling means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03H9/525" definition-exists="false" ipc-concordant="H03H9/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H03H9/525</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>for microelectro-mechanical 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="9" additional-only="false" sort-key="H03H9/54" definition-exists="false" ipc-concordant="H03H9/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising resonators of piezo-electric or electrostrictive material </text><reference><text><class-ref scheme="cpc">H03H9/64</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="H03H9/542" definition-exists="false" ipc-concordant="H03H9/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/542</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including passive elements </text><reference><text><class-ref scheme="cpc">H03H9/545</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="H03H9/545" definition-exists="false" ipc-concordant="H03H9/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/545</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including active elements</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="H03H9/547" definition-exists="false" ipc-concordant="H03H9/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/547</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Notch filters, e.g. notch BAW or thin film resonator filters</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="H03H9/56" definition-exists="false" ipc-concordant="H03H9/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monolithic crystal filters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03H9/562" definition-exists="false" ipc-concordant="H03H9/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/562</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a ceramic piezoelectric layer</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="H03H9/564" definition-exists="false" ipc-concordant="H03H9/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/564</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>implemented with thin-film techniques</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="H03H9/566" definition-exists="false" ipc-concordant="H03H9/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/566</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electric coupling means therefor </text><reference><text><class-ref scheme="cpc">H03H9/0095</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="H03H9/568" definition-exists="false" ipc-concordant="H03H9/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/568</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of a ladder configuration</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="H03H9/58" definition-exists="false" ipc-concordant="H03H9/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple crystal filters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H03H9/581" definition-exists="false" ipc-concordant="H03H9/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/581</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising ceramic piezoelectric layers</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="H03H9/582" definition-exists="false" ipc-concordant="H03H9/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/582</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>implemented with thin-film techniques</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="H03H9/583" definition-exists="false" ipc-concordant="H03H9/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/583</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a plurality of piezoelectric layers acoustically coupled</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="H03H9/584" definition-exists="false" ipc-concordant="H03H9/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/584</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coupled Resonator Filters [CFR]</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="H03H9/585" definition-exists="false" ipc-concordant="H03H9/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/585</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stacked Crystal Filters [SCF]</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="H03H9/586" definition-exists="false" ipc-concordant="H03H9/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/586</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for mounting to a substrate, i.e. means constituting the material interface confining the waves to a volume</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="H03H9/587" definition-exists="false" ipc-concordant="H03H9/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/587</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Air-gaps</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="H03H9/588" definition-exists="false" ipc-concordant="H03H9/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/588</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Membranes</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="H03H9/589" definition-exists="false" ipc-concordant="H03H9/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/589</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Acoustic mirrors</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="H03H9/60" definition-exists="false" ipc-concordant="H03H9/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electric coupling means therefor </text><CPC-specific-text><reference><text><class-ref scheme="cpc">H03H9/0095</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="H03H9/605" definition-exists="false" ipc-concordant="H03H9/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting of a ladder configuration</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="H03H9/62" definition-exists="false" ipc-concordant="H03H9/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising resonators of magnetostrictive material </text><reference><text><class-ref scheme="cpc">H03H9/64</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="H03H9/64" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using surface acoustic waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H9/6403" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Programmable filters</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="H03H9/6406" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6406</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filters characterised by a particular frequency characteristic</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="H03H9/6409" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6409</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>SAW notch filters</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="H03H9/6413" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6413</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>SAW comb filters</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="H03H9/6416" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>SAW matched filters, e.g. surface acoustic wave compressors, chirped or coded surface acoustic wave filters</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="H03H9/642" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/642</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>SAW transducers details for remote interrogation systems, e.g. surface acoustic wave transducers details for ID-tags </text><reference><text>remote interrogation systems <u>per se</u> <class-ref scheme="cpc">G06K7/10009</class-ref>, <class-ref scheme="cpc">G01S13/74</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="H03H9/6423" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for obtaining a particular transfer characteristic</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="H03H9/6426" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combinations of the characteristics of different transducers</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="H03H9/643" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/643</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the transfer characteristic being determined by reflective or coupling array characteristics</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="H03H9/6433" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coupled resonator filters</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="H03H9/6436" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6436</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having one acoustic track only</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="H03H9/644" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/644</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having two acoustic tracks</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="H03H9/6443" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6443</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>being acoustically coupled</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="H03H9/6446" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by floating multistrip couplers </text><reference><text><class-ref scheme="cpc">H03H9/645</class-ref>, <class-ref scheme="cpc">H03H9/6453</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="14" additional-only="false" sort-key="H03H9/645" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/645</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by grating reflectors overlapping both tracks</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="H03H9/6453" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6453</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by at least an interdigital transducer overlapping both tracks</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="H03H9/6456" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6456</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>being electrically coupled</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="H03H9/6459" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6459</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>via one connecting electrode</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="H03H9/6463" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the tracks being electrically cascaded</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="H03H9/6466" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>each track containing more than two transducers</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="14" additional-only="false" sort-key="H03H9/6469" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6469</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>via two connecting electrodes</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="H03H9/6473" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6473</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the electrodes being electrically interconnected</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="H03H9/6476" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6476</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the tracks being electrically parallel</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="12" additional-only="false" sort-key="H03H9/6479" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6479</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Capacitively coupled SAW resonator filters</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="H03H9/6483" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ladder SAW filters</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="H03H9/6486" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6486</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having crossing or intersecting acoustic tracks, e.g. intersection in a perpendicular or diagonal orientation</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="H03H9/6489" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6489</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Compensation of undesirable effects</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="H03H9/6493" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6493</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Side lobe suppression</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="H03H9/6496" definition-exists="false" ipc-concordant="H03H9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/6496</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reducing ripple in transfer characteristic</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="H03H9/66" definition-exists="false" ipc-concordant="H03H9/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Phase shifters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03H9/68" definition-exists="false" ipc-concordant="H03H9/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using surface acoustic waves</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="H03H9/70" definition-exists="false" ipc-concordant="H03H9/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple-port networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03H9/703" definition-exists="false" ipc-concordant="H03H9/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/703</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Networks using bulk acoustic wave devices</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="H03H9/706" definition-exists="false" ipc-concordant="H03H9/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/706</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Duplexers</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="H03H9/72" definition-exists="false" ipc-concordant="H03H9/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Networks using surface acoustic waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H9/725" definition-exists="false" ipc-concordant="H03H9/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/725</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Duplexers</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="H03H9/74" definition-exists="false" ipc-concordant="H03H9/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple-port networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source </text><reference><text>networks for phase shifting <class-ref scheme="cpc">H03H9/66</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="H03H9/76" definition-exists="false" ipc-concordant="H03H9/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H9/76</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Networks using surface acoustic waves</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="H03H11/00" definition-exists="true" ipc-concordant="H03H11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-10-01" status="published"><classification-symbol>H03H11/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Networks using active elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03H11/02" definition-exists="false" ipc-concordant="H03H11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple-port networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03H11/025" definition-exists="false" ipc-concordant="H03H11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using current conveyors</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="H03H11/04" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency selective two-port networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H11/0405" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/0405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Non-linear filters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H11/0411" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2011/0411</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rank order or median 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="10" additional-only="false" sort-key="H03H11/0416" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/0416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using positive impedance converters </text><reference><text><class-ref scheme="cpc">H03H11/08</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="H03H11/0422" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/0422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transconductance amplifiers, e.g. gmC filters</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="H03H11/0427" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03H11/0427</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Filters using a single transconductance amplifier; Filters derived from a single transconductor filter, e.g. by element substitution, cascading, parallel connection </text><reference><text><class-ref scheme="cpc">H03H11/0433</class-ref> - <class-ref scheme="cpc">H03H11/0472</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="11" additional-only="false" sort-key="H03H11/0433" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/0433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Two integrator loop filters </text><reference><text><class-ref scheme="cpc">H03H11/0455</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="H03H11/0438" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/0438</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tow-Thomas biquad</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="H03H11/0444" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/0444</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Simulation of ladder networks</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="H03H11/045" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Leapfrog 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="H03H11/0455" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/0455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple integrator loop feedback filters</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="H03H11/0461" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/0461</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Current mode filters</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="H03H11/0466" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/0466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filters combining transconductance amplifiers with other active elements, e.g. operational amplifiers, transistors, voltage conveyors</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="H03H11/0472" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/0472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Current or voltage controlled filters</text></CPC-specific-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="H03H11/0477" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2011/0477</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using current feedback operational amplifiers</text></CPC-specific-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="H03H11/0483" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2011/0483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using operational transresistance amplifiers [OTRA]</text></CPC-specific-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="H03H11/0488" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2011/0488</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Notch or bandstop filters</text></CPC-specific-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="H03H11/0494" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2011/0494</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Complex filters</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="H03H11/06" definition-exists="false" ipc-concordant="H03H11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising means for compensation of loss</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="H03H11/08" definition-exists="false" ipc-concordant="H03H11/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using gyrators</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="H03H11/10" definition-exists="false" ipc-concordant="H03H11/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using negative impedance converters </text><reference><text><class-ref scheme="cpc">H03H11/08</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="H03H11/11" definition-exists="false" ipc-concordant="H03H11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using current conveyors</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="H03H11/12" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using amplifiers with feedback </text><reference><CPC-specific-text><text><class-ref scheme="cpc">H03H11/0422</class-ref></text></CPC-specific-text><text> , <class-ref scheme="cpc">H03H11/08</class-ref>, <class-ref scheme="cpc">H03H11/10</class-ref> take 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="H03H11/1204" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1204</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distributed RC filters</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="H03H11/1208" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising an electromechanical resonator</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="H03H11/1213" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1213</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transistor amplifiers </text><reference><text><class-ref scheme="cpc">H03H11/1204</class-ref> takes precedence; parallel-T filters <class-ref scheme="cpc">H03H11/1295</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="H03H11/1217" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1217</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a plurality of operational amplifiers </text><reference><text><class-ref scheme="cpc">H03H11/1204</class-ref> takes precedence; parallel-T filters <class-ref scheme="cpc">H03H11/1295</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="H03H11/1221" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03H11/1221</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Theory; Synthesis </text><reference><text><class-ref scheme="cpc">H03H11/1226</class-ref> - <class-ref scheme="cpc">H03H11/1252</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="12" additional-only="false" sort-key="H03H11/1226" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filters using operational amplifier poles</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="H03H11/123" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modifications to reduce sensitivity</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="H03H11/1234" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1234</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modifications to reduce detrimental influences of amplifier imperfections, e.g. limited gain-bandwith product, limited input impedance</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="H03H11/1239" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1239</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modifications to reduce influence of variations of temperature</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="H03H11/1243" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1243</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Simulation of ladder networks</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="H03H11/1247" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H03H11/1247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Leapfrog 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="12" additional-only="false" sort-key="H03H11/1252" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Two integrator-loop-filters</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="H03H11/1256" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H03H11/1256</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tow-Thomas biquad</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="H03H11/126" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a single operational amplifier </text><reference><text><class-ref scheme="cpc">H03H11/1204</class-ref> takes precedence; parallel-T filters <class-ref scheme="cpc">H03H11/1295</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="H03H11/1265" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03H11/1265</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Synthesis </text><reference><text><class-ref scheme="cpc">H03H11/1269</class-ref> - <class-ref scheme="cpc">H03H11/1282</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="12" additional-only="false" sort-key="H03H11/1269" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1269</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filters using the operational amplifier pole</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="H03H11/1273" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modifications to reduce sensitivity</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="H03H11/1278" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modifications to reduce detrimental influences of amplifier imperfections, e.g. limited gain-bandwith product, limited input impedance</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="H03H11/1282" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modifications to reduce influence of variations of temperature</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="H03H11/1286" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>H03H11/1286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sallen-Key biquad</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="H03H11/1291" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1291</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Current or voltage controlled filters</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="H03H11/1295" definition-exists="false" ipc-concordant="H03H11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/1295</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Parallel-T 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="10" additional-only="false" sort-key="H03H11/14" definition-exists="false" ipc-concordant="H03H11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electro-optic 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="H03H11/16" definition-exists="false" ipc-concordant="H03H11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Networks for phase shifting</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H11/18" definition-exists="false" ipc-concordant="H03H11/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Two-port phase shifters providing a predetermined phase shift, e.g. "all-pass" filters</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="H03H11/20" definition-exists="false" ipc-concordant="H03H11/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Two-port phase shifters providing an adjustable phase shift</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="H03H11/22" definition-exists="false" ipc-concordant="H03H11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>providing two or more phase shifted output signals, e.g. n-phase output</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="H03H11/24" definition-exists="false" ipc-concordant="H03H11/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency-independent attenuators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H11/245" definition-exists="false" ipc-concordant="H03H11/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using field-effect transistor</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="H03H11/26" definition-exists="false" ipc-concordant="H03H11/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Time-delay networks </text><reference><text>analogue shift registers <class-ref scheme="cpc">G11C27/04</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="H03H11/265" definition-exists="false" ipc-concordant="H03H11/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with adjustable delay</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="H03H11/28" definition-exists="false" ipc-concordant="H03H11/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Impedance matching networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H11/30" definition-exists="false" ipc-concordant="H03H11/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Automatic matching of source impedance to load impedance</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="H03H11/32" definition-exists="false" ipc-concordant="H03H11/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Balance-unbalance networks</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="H03H11/34" definition-exists="false" ipc-concordant="H03H11/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H11/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Networks for connecting several sources or loads working on different frequencies or frequency bands, to a common load or source </text><reference><text>for use in multiplex transmission systems <class-ref scheme="cpc">H04J1/00</class-ref></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="H03H15/005" definition-exists="false" ipc-concordant="H03H15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2015/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising capacitors implemented with MEMS technology</text></CPC-specific-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="H03H15/007" definition-exists="false" ipc-concordant="H03H15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2015/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Programmable filters</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="H03H15/02" definition-exists="true" ipc-concordant="H03H15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H15/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using analogue shift registers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H03H17/0018" definition-exists="true" ipc-concordant="H03H17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Realizing a fractional delay</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="H03H17/0036" definition-exists="true" ipc-concordant="H03H17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of a recursive filter</text></CPC-specific-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="H03H17/009" definition-exists="false" ipc-concordant="H03H17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2017/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of IIR 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="8" additional-only="false" sort-key="H03H17/02" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency selective networks </text><CPC-specific-text><reference><text>digital computers for complex mathematical operations <class-ref scheme="cpc">G06F17/10</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="H03H17/0201" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0201</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wave digital filters</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="H03H17/0202" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Two or more dimensional filters; Filters for complex signals </text><reference><text>multidimensional convolutions <class-ref scheme="cpc">G06F17/153</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="H03H17/0266" definition-exists="true" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filter banks</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="H03H17/0269" definition-exists="true" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0269</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising recursive 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="11" additional-only="false" sort-key="H03H17/0272" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Quadrature mirror filters</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="H03H17/0273" definition-exists="true" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polyphase filters</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="H03H17/0275" definition-exists="true" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising non-recursive filters</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="H03H17/0276" definition-exists="true" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0276</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having two phases</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="H03H17/0277" definition-exists="true" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0277</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising recursive filters</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="H03H17/0279" definition-exists="true" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0279</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having two phases</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="10" additional-only="false" sort-key="H03H17/028" definition-exists="true" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polynomial filters</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="H03H17/0282" definition-exists="true" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sinc or gaussian filters </text><reference><text><class-ref scheme="cpc">H03H17/0671</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="H03H17/0283" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03H17/0283</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Filters characterised by the filter structure </text><reference><text><class-ref scheme="cpc">H03H17/0202</class-ref>, <class-ref scheme="cpc">H03H17/0219</class-ref> - <class-ref scheme="cpc">H03H17/0248</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="H03H17/0285" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ladder or lattice filters</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="H03H17/0286" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combinations of filter structures</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="H03H17/0288" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Recursive, non-recursive, ladder, lattice structures</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="H03H17/0289" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0289</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Digital and active filter structures</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="H03H17/0291" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0291</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Digital and sampled data 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="10" additional-only="false" sort-key="H03H17/0292" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0292</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time multiplexed filters; Time sharing 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="H03H17/0294" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0294</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Variable filters; Programmable filters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03H17/0295" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2017/0295</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Changing between two filter characteristics</text></CPC-specific-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="H03H17/0297" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2017/0297</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coefficients derived from input parameters</text></CPC-specific-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="H03H17/0298" definition-exists="false" ipc-concordant="H03H17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2017/0298</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>DSP implementation</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="H03H17/04" definition-exists="false" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recursive filters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H17/0405" definition-exists="false" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a ROM addressed by the input and output data signals</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="H03H17/0411" definition-exists="false" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0411</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using DELTA modulation</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="H03H17/0416" definition-exists="true" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing</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="H03H17/0422" definition-exists="true" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the input and output signals being derived from two separate clocks, i.e. asynchronous sample rate conversion</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="H03H17/0427" definition-exists="true" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterized by the ratio between the input-sampling and output-delivery frequencies</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="H03H17/0433" definition-exists="true" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the ratio being arbitrary or irrational</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="H03H17/0438" definition-exists="true" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0438</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the ratio being integer</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="H03H17/0444" definition-exists="true" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0444</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the output-delivery frequency is higher than the input sampling frequency, i.e. interpolation</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="H03H17/045" definition-exists="true" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the output-delivery frequency is lower than the input sampling frequency, i.e. decimation</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="H03H17/0455" definition-exists="true" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the ratio being rational</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="H03H17/0461" definition-exists="false" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0461</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Quantisation; Rounding; Truncation; Overflow oscillations or limit cycles eliminating measures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H17/0466" definition-exists="false" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2017/0466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reduction of limit cycle oscillation</text></CPC-specific-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="H03H17/0472" definition-exists="false" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2017/0472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on allpass structures</text></CPC-specific-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="H03H17/0477" definition-exists="false" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2017/0477</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Direct form I</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H17/0483" definition-exists="false" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2017/0483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transposed</text></CPC-specific-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="H03H17/0488" definition-exists="false" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2017/0488</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Direct form II</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H17/0494" definition-exists="false" ipc-concordant="H03H17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2017/0494</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transposed</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="H03H17/06" definition-exists="false" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-recursive filters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H03H17/0607" definition-exists="false" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0607</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a ROM addressed by the input data signals</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="H03H17/0614" definition-exists="false" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0614</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using Delta-modulation</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="H03H17/0621" definition-exists="true" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0621</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing</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="H03H17/0628" definition-exists="true" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0628</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the input and output signals being derived from two separate clocks, i.e. asynchronous sample rate conversion</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="H03H17/0635" definition-exists="true" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0635</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterized by the ratio between the input-sampling and output-delivery frequencies</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="H03H17/0642" definition-exists="true" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0642</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the ratio being arbitrary or irrational</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="H03H17/065" definition-exists="true" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the ratio being integer</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="H03H17/0657" definition-exists="true" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0657</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the output-delivery frequency is higher than the input sampling frequency, i.e. interpolation</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="H03H17/0664" definition-exists="true" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0664</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the output-delivery frequency is lower than the input sampling frequency, i.e. decimation</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="H03H17/0671" definition-exists="true" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0671</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cascaded integrator-comb [CIC] filters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="H03H17/0678" definition-exists="false" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2017/0678</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with parallel structure, i.e. parallel CIC [PCIC]</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="H03H17/0685" definition-exists="true" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/0685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the ratio being rational</text></CPC-specific-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="H03H17/0692" definition-exists="false" ipc-concordant="H03H17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2017/0692</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transposed</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="H03H17/08" definition-exists="false" ipc-concordant="H03H17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H17/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Networks for phase shifting</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="H03H19/00" definition-exists="true" ipc-concordant="H03H19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H19/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Networks using time-varying elements, e.g. N-path filters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03H19/002" definition-exists="false" ipc-concordant="H03H19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H19/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>N-path filters</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="H03H19/004" definition-exists="false" ipc-concordant="H03H19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H19/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switched capacitor networks</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="H03H19/006" definition-exists="false" ipc-concordant="H03H19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H19/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>simulating one-port networks</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="H03H19/008" definition-exists="false" ipc-concordant="H03H19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H19/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with variable switch closing time</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="7" additional-only="false" sort-key="H03H21/00" definition-exists="true" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adaptive networks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H03H21/0001" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Analogue adaptive filters</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="H03H21/0003" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising CCD devices</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="H03H21/0005" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising SAW devices</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="H03H21/0007" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising switched capacitor [SC] devices</text></CPC-specific-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="H03H21/0009" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0009</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="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03H21/001" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Analog multipliers</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="H03H21/0012" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Digital adaptive filters</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="H03H21/0014" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lattice filters</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="H03H21/0016" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Non linear filters</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="H03H21/0018" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Matched filters</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="H03H21/002" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H03H21/002</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Filters with a particular frequency response </text><reference><text><class-ref scheme="cpc">H03H21/0014</class-ref> - <class-ref scheme="cpc">H03H21/0018</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="H03H21/0021" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Notch filters</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="H03H21/0023" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comb 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="H03H21/0025" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Particular filtering methods</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="H03H21/0027" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>filtering in the frequency domain</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="H03H21/0029" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on statistics</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="H03H21/003" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>KALMAN filters</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="H03H21/0032" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ARMA filters</text></CPC-specific-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="H03H21/0034" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0034</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Blind source separation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H21/0036" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of convolutive mixtures</text></CPC-specific-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="H03H21/0038" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of instantaneous mixtures</text></CPC-specific-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="H03H21/004" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using state space representation</text></CPC-specific-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="H03H21/0041" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Subband decomposition</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="H03H21/0043" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H21/0043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adaptive algorithms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="H03H21/0045" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Equation error</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H21/0047" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combined output and equation error</text></CPC-specific-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="H03H21/0049" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0049</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Recursive least squares algorithm</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H21/005" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with forgetting factor</text></CPC-specific-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="H03H21/0052" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>combined with stochastic gradient algorithm</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="H03H21/0054" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Affine projection</text></CPC-specific-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="H03H21/0056" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0056</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Non-recursive least squares algorithm [LMS]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="H03H21/0058" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Block LMS, i.e. in frequency domain</text></CPC-specific-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="H03H21/0059" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0059</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Delayed LMS</text></CPC-specific-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="H03H21/0061" definition-exists="false" ipc-concordant="H03H21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H03H2021/0061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Normalized LMS [NLMS]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03H220/02" 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>H03H2220/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modular, e.g. cells connected in cascade</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="H03H220/04" 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>H03H2220/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pipelined</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="H03H220/06" 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>H03H2220/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systolic</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="H03H220/08" 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>H03H2220/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Variable filter length</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="H03H222/00" 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>H03H2222/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to digital filtering methods</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="H03H222/02" 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>H03H2222/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using fuzzy logic</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="H03H222/04" 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>H03H2222/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using neural networks</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="H03H222/06" 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>H03H2222/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using wavelets</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="H03H240/00" 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>H03H2240/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to filter banks</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H03H250/00" 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>H03H2250/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing scheme relating to dual- or multi-band filters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="H03H260/00" 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>H03H2260/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Theory relating to impedance networks</text></title-part></class-title></classification-item></classification-item></classification-item></class-scheme> |