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350 lines
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350 lines
183 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="G01V" definition-exists="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>GEOPHYSICS</text></title-part><title-part><text>GRAVITATIONAL MEASUREMENTS</text></title-part><title-part><text>DETECTING MASSES OR OBJECTS</text></title-part><title-part><text>TAGS </text><reference><text>means for indicating the location of accidentally buried, e.g. snow-buried persons <class-ref scheme="cpc">A63B29/02</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> radar, sonar, lidar or analogous systems specifically designed for geophysical use. Radar, sonar, lidar or analogous systems, or details of such systems, if of a general interest, are also classified in subclass <class-ref scheme="cpc">G01S</class-ref>.</note-paragraph><note-paragraph>In this subclass, the following term is used with the meaning indicated:<subnote type="bullet"><note-paragraph>"tags" means arrangements cooperating with a detecting field, e.g. near field, and designed to produce a specific detectable effect; "tags" also means active markers capable of generating a detectable field.</note-paragraph></subnote></note-paragraph><note-paragraph>In this subclass, the geophysical methods apply both to the earth and to other celestial objects, e.g. planets.</note-paragraph><note-paragraph>Attention is drawn to the Notes following the title of class <class-ref scheme="cpc">G01</class-ref>.</note-paragraph></note><note type="warning"><note-paragraph warning-type="ipc-not-used">The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: <table><row><entry><class-ref scheme="ipc">G01V3/11</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">G01V3/101</class-ref>, <class-ref scheme="cpc">G01V3/104</class-ref></entry></row></table></note-paragraph><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="G01V1/00" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01V1/00" definition-exists="true" ipc-concordant="G01V1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G01V1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Seismology</text></title-part><title-part><text>Seismic or acoustic prospecting or detecting</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Groups <class-ref scheme="cpc">G01V1/44</class-ref> - <class-ref scheme="cpc">G01V1/52</class-ref> take precedence over groups <class-ref scheme="cpc">G01V1/001</class-ref> - <class-ref scheme="cpc">G01V1/393</class-ref> <class-ref scheme="cpc">G01V1/42</class-ref></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01V1/001" definition-exists="true" ipc-concordant="G01V1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Acoustic presence detection </text><reference><text>measurement of sonic vibrations <class-ref scheme="cpc">G01H</class-ref>; alarm systems <class-ref scheme="cpc">G08B</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="G01V1/003" definition-exists="true" ipc-concordant="G01V1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Seismic data acquisition in general, e.g. survey design </text><reference><text><class-ref scheme="cpc">G01V1/3808</class-ref>, <class-ref scheme="cpc">G01V1/42</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="G01V1/005" definition-exists="false" ipc-concordant="G01V1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with exploration systems emitting special signals, e.g. frequency swept signals, pulse sequences or slip sweep arrangements</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="G01V1/006" definition-exists="false" ipc-concordant="G01V1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>generating single signals by using more than one generator, e.g. beam steering or focussing arrays </text><reference><text><class-ref scheme="cpc">G01V1/13</class-ref>, <class-ref scheme="cpc">G01V1/3861</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="8" additional-only="false" sort-key="G01V1/008" definition-exists="true" ipc-concordant="G01V1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Earthquake measurement or prediction </text><reference><text>event detection for microseismic events <class-ref scheme="cpc">G01V1/288</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01V1/02" definition-exists="true" ipc-concordant="G01V1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V1/02</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Generating seismic energy </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G01V1/003</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="G01V1/04" definition-exists="false" ipc-concordant="G01V1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/04</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="10" additional-only="false" sort-key="G01V1/047" definition-exists="false" ipc-concordant="G01V1/047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for coupling the generator to the ground</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01V1/0475" definition-exists="false" ipc-concordant="G01V1/047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/0475</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for controlling "Ground Force"</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="G01V1/053" definition-exists="false" ipc-concordant="G01V1/053" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/053</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for generating transverse waves</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="G01V1/06" definition-exists="false" ipc-concordant="G01V1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ignition devices </text><reference><text><class-ref scheme="cpc">G01V1/393</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="G01V1/08" definition-exists="false" ipc-concordant="G01V1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving time-delay devices</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="G01V1/09" definition-exists="false" ipc-concordant="G01V1/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transporting arrangements, e.g. on vehicles </text><reference><text><class-ref scheme="cpc">G01V1/38</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/104" definition-exists="false" ipc-concordant="G01V1/104" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/104</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using explosive charges </text><reference><text><class-ref scheme="cpc">G01V1/157</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="G01V1/108" definition-exists="false" ipc-concordant="G01V1/108" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by deforming or displacing surfaces of enclosures</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01V1/112" definition-exists="false" ipc-concordant="G01V1/112" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/112</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for use on the surface of the earth</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="G01V1/116" definition-exists="false" ipc-concordant="G01V1/116" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/116</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>where pressurised combustion gases escape from the generator in a pulsating manner, e.g. for generating bursts</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="G01V1/13" definition-exists="false" ipc-concordant="G01V1/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements or disposition of charges to produce a desired pattern in space or time</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="G01V1/133" definition-exists="false" ipc-concordant="G01V1/133" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/133</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using fluidic driving means, e.g. highly pressurised fluids; </text><CPC-specific-text><text>using implosion</text></CPC-specific-text><reference><text><class-ref scheme="cpc">G01V1/104</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="G01V1/135" definition-exists="false" ipc-concordant="G01V1/135" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/135</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by deforming or displacing surfaces of enclosures </text><CPC-specific-text><text>, e.g. by hydraulically driven vibroseis™</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="G01V1/137" definition-exists="false" ipc-concordant="G01V1/137" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/137</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>which fluid escapes from the generator in a pulsating manner, e.g. for generating bursts </text><CPC-specific-text><text>, airguns</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="G01V1/143" definition-exists="false" ipc-concordant="G01V1/143" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G01V1/143</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>using mechanical driving means </text><CPC-specific-text><text>, e.g. motor driven shaft</text></CPC-specific-text><reference><text><class-ref scheme="cpc">G01V1/104</class-ref>, <class-ref scheme="cpc">G01V1/133</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="G01V1/145" definition-exists="false" ipc-concordant="G01V1/145" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by deforming or displacing surfaces </text><CPC-specific-text><text>, e.g. by mechanically driven vibroseis™</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="G01V1/147" definition-exists="false" ipc-concordant="G01V1/147" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/147</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using impact of dropping masses</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="G01V1/153" definition-exists="false" ipc-concordant="G01V1/153" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/153</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using rotary unbalanced masses</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="G01V1/155" definition-exists="false" ipc-concordant="G01V1/155" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/155</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using reciprocating masses</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="G01V1/157" definition-exists="false" ipc-concordant="G01V1/157" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V1/157</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using spark discharges</text></title-part><title-part><text>using exploding wires</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="G01V1/159" definition-exists="false" ipc-concordant="G01V1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/159</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using piezoelectric or magnetostrictive driving means </text><reference><text>generating mechanical vibrations by using piezoelectric or magnetostrictive effect in general, <class-ref scheme="cpc">B06B1/06</class-ref>, <class-ref scheme="cpc">B06B1/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01V1/16" definition-exists="true" ipc-concordant="G01V1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V1/16</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Receiving elements for seismic signals</text></title-part><title-part><text>Arrangements or adaptations of receiving 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="G01V1/162" definition-exists="false" ipc-concordant="G01V1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/162</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01V1/164" definition-exists="false" ipc-concordant="G01V1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/164</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits therefore</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="G01V1/166" definition-exists="false" ipc-concordant="G01V1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/166</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for coupling receivers to the ground</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="G01V1/168" definition-exists="false" ipc-concordant="G01V1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/168</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Deployment of receiver elements </text><reference><text><class-ref scheme="cpc">G01V1/3843</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/18" definition-exists="false" ipc-concordant="G01V1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Receiving elements, e.g. seismometer, geophone </text><CPC-specific-text><text>or torque detectors, for localised single point measurements</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="G01V1/181" definition-exists="false" ipc-concordant="G01V1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/181</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Geophones</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="G01V1/182" definition-exists="false" ipc-concordant="G01V1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with moving coil</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="G01V1/183" definition-exists="false" ipc-concordant="G01V1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with moving magnet</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="G01V1/184" definition-exists="false" ipc-concordant="G01V1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/184</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-component geophones</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="G01V1/185" definition-exists="false" ipc-concordant="G01V1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with adaptable orientation, e.g. gimballed</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="G01V1/186" definition-exists="false" ipc-concordant="G01V1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hydrophones</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="G01V1/187" definition-exists="false" ipc-concordant="G01V1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/187</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Direction-sensitive hydrophones</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="G01V1/188" definition-exists="false" ipc-concordant="G01V1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/188</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with pressure compensating means</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="G01V1/189" definition-exists="false" ipc-concordant="G01V1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/189</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combinations of different types of receiving elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/20" definition-exists="false" ipc-concordant="G01V1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements of receiving elements, e.g. geophone pattern</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01V1/201" definition-exists="false" ipc-concordant="G01V1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/201</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional details of seismic cables, e.g. streamers </text><reference><text>integrated optoseismic systems <class-ref scheme="cpc">G01V1/226</class-ref>; line connectors in general <class-ref scheme="cpc">H01R</class-ref>, transducer mountings in general <class-ref scheme="cpc">G10K11/004</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="G01V1/202" definition-exists="false" ipc-concordant="G01V1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Connectors, e.g. for force, signal or power</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="G01V1/204" definition-exists="false" ipc-concordant="G01V1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2001/204</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reinforcements, e.g. by tensioning cables</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="G01V1/205" definition-exists="false" ipc-concordant="G01V1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2001/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Internal damping</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="G01V1/207" definition-exists="false" ipc-concordant="G01V1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2001/207</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Buoyancy</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="G01V1/208" definition-exists="false" ipc-concordant="G01V1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a continuous structure </text><reference><text>detecting traffic <class-ref scheme="cpc">G08G</class-ref>, transducers in general <class-ref scheme="cpc">G10K</class-ref></text></reference></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="G01V1/22" definition-exists="true" ipc-concordant="G01V1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V1/22</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Transmitting seismic signals to recording or processing apparatus</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/223" definition-exists="false" ipc-concordant="G01V1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/223</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Radioseismic 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="G01V1/226" definition-exists="false" ipc-concordant="G01V1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optoseismic systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01V1/24" definition-exists="true" ipc-concordant="G01V1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V1/24</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Recording seismic data</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/242" definition-exists="false" ipc-concordant="G01V1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Seismographs</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="G01V1/245" definition-exists="false" ipc-concordant="G01V1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Amplitude control for seismic recording </text><reference><text>control of amplification in general <class-ref scheme="cpc">H03G</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/247" definition-exists="false" ipc-concordant="G01V1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Digital recording of seismic data, e.g. in acquisition units or nodes</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="G01V1/26" definition-exists="false" ipc-concordant="G01V1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reference-signal-transmitting devices, e.g. indicating moment of firing of shot</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="G01V1/28" definition-exists="true" ipc-concordant="G01V1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Processing seismic data, e.g. analysis, for interpretation, for correction </text><reference><text><class-ref scheme="cpc">G01V1/48</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/282" definition-exists="false" ipc-concordant="G01V1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Application of seismic models, synthetic seismograms</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="G01V1/284" definition-exists="false" ipc-concordant="G01V1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Application of the shear wave component and/or several components of the seismic signal</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="G01V1/286" definition-exists="false" ipc-concordant="G01V1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mode conversion</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="G01V1/288" definition-exists="false" ipc-concordant="G01V1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-09-01" status="published"><classification-symbol>G01V1/288</classification-symbol><class-title date-revised="2015-09-01"><title-part><CPC-specific-text><text>Event detection in seismic signals, e.g. microseismics </text><reference><text>earthquakes <class-ref scheme="cpc">G01V1/008</class-ref>; <class-ref scheme="cpc">G01V1/36</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/30" definition-exists="false" ipc-concordant="G01V1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Analysis </text><reference><text><class-ref scheme="cpc">G01V1/50</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="G01V1/301" definition-exists="false" ipc-concordant="G01V1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/301</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for determining seismic cross-sections or geostructures</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="G01V1/302" definition-exists="false" ipc-concordant="G01V1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in 3D data cubes</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="G01V1/303" definition-exists="false" ipc-concordant="G01V1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/303</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for determining velocity profiles or travel times</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="G01V1/305" definition-exists="false" ipc-concordant="G01V1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Travel times</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="G01V1/306" definition-exists="false" ipc-concordant="G01V1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/306</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for determining physical properties of the subsurface, e.g. impedance, porosity or attenuation profiles</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="G01V1/307" definition-exists="false" ipc-concordant="G01V1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/307</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for determining seismic attributes, e.g. amplitude, instantaneous phase or frequency, reflection strength or polarity</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="G01V1/308" definition-exists="false" ipc-concordant="G01V1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/308</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time lapse or 4D effects, e.g. production related effects to the formation </text><reference><text>fluid flow <u>per se</u> <class-ref scheme="cpc">E21B47/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/32" definition-exists="false" ipc-concordant="G01V1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transforming one recording into another </text><CPC-specific-text><text>or one representation into another</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="G01V1/325" definition-exists="false" ipc-concordant="G01V1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transforming one representation into another</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="G01V1/34" definition-exists="false" ipc-concordant="G01V1/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Displaying seismic recordings </text><CPC-specific-text><text>or visualisation of seismic data or attributes</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="G01V1/345" definition-exists="false" ipc-concordant="G01V1/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/345</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Visualisation of seismic data or attributes, e.g. in 3D cubes</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="G01V1/36" definition-exists="false" ipc-concordant="G01V1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Effecting static or dynamic corrections on records, e.g. correcting spread</text></title-part><title-part><text>Correlating seismic signals</text></title-part><title-part><text>Eliminating effects of unwanted energy</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01V1/362" definition-exists="false" ipc-concordant="G01V1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/362</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Effecting static or dynamic corrections; Stacking</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="G01V1/364" definition-exists="false" ipc-concordant="G01V1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/364</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Seismic filtering </text><reference><text><class-ref scheme="cpc">G01V1/37</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="G01V1/366" definition-exists="false" ipc-concordant="G01V1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/366</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by correlation of seismic signals</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="G01V1/368" definition-exists="false" ipc-concordant="G01V1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/368</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inverse filtering</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="G01V1/37" definition-exists="false" ipc-concordant="G01V1/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01V1/37</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>specially adapted for seismic systems using continuous agitation of the ground </text><CPC-specific-text><text>, e.g. using pulse compression of frequency swept signals for enhancement of received signals</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="G01V1/375" definition-exists="false" ipc-concordant="G01V1/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/375</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Correlating received seismic signals with the emitted source signal</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="G01V1/38" definition-exists="true" ipc-concordant="G01V1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for water-covered areas </text><reference><text><class-ref scheme="cpc">G01V1/28</class-ref>, </text><CPC-specific-text><text><class-ref scheme="cpc">G01V1/42</class-ref></text></CPC-specific-text><text> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/3808" definition-exists="false" ipc-concordant="G01V1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/3808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Seismic data acquisition, e.g. survey design </text><reference><text>in general <class-ref scheme="cpc">G01V1/003</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/3817" definition-exists="false" ipc-concordant="G01V1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/3817</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Positioning of seismic 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="G01V1/3826" definition-exists="false" ipc-concordant="G01V1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/3826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>dynamic steering, e.g. by paravanes or birds</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="G01V1/3835" definition-exists="false" ipc-concordant="G01V1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/3835</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>measuring position, e.g. by GPS or acoustically</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="G01V1/3843" definition-exists="false" ipc-concordant="G01V1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/3843</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Deployment of seismic devices, e.g. of streamers </text><reference><text>equipment for marine deployment in general <class-ref scheme="cpc">B63B</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="G01V1/3852" definition-exists="false" ipc-concordant="G01V1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/3852</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to the seabed</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="G01V1/3861" definition-exists="false" ipc-concordant="G01V1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/3861</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>control of source arrays, e.g. for far field control</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="G01V1/387" definition-exists="false" ipc-concordant="G01V1/387" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/387</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reducing secondary bubble pulse, i.e. reducing the detected signals resulting from the generation and release of gas bubbles after the primary explosion</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="G01V1/393" definition-exists="false" ipc-concordant="G01V1/393" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/393</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for loading explosive underwater charges, e.g. combined with ignition devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01V1/40" definition-exists="true" ipc-concordant="G01V1/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for well-logging</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/42" definition-exists="false" ipc-concordant="G01V1/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G01V1/42</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>using generators in one well and receivers elsewhere or <u>vice versa</u> </text><reference><text><class-ref scheme="cpc">G01V1/52</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V1/44" definition-exists="false" ipc-concordant="G01V1/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using generators and receivers in the same well </text><reference><text><class-ref scheme="cpc">G01V1/52</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="G01V1/46" definition-exists="false" ipc-concordant="G01V1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Data acquisition</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="G01V1/48" definition-exists="false" ipc-concordant="G01V1/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Processing data</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01V1/50" definition-exists="false" ipc-concordant="G01V1/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-02-04" status="published"><classification-symbol>G01V1/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Analysing data</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="G01V1/52" definition-exists="false" ipc-concordant="G01V1/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structural details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01V1/523" definition-exists="false" ipc-concordant="G01V1/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V1/523</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Damping devices</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="G01V1/526" definition-exists="false" ipc-concordant="G01V1/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2001/526</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting of transducers</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="7" additional-only="false" sort-key="G01V3/00" definition-exists="true" ipc-concordant="G01V3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V3/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Electric or magnetic prospecting or detecting</text></title-part><title-part><text>Measuring magnetic field characteristics of the earth, e.g. declination, deviation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01V3/02" definition-exists="false" ipc-concordant="G01V3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating with propagation of electric current</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V3/04" definition-exists="false" ipc-concordant="G01V3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using dc</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="G01V3/06" definition-exists="false" ipc-concordant="G01V3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ac</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="G01V3/08" definition-exists="false" ipc-concordant="G01V3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V3/08</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices </text><reference><text>with electromagnetic waves <class-ref scheme="cpc">G01V3/12</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="G01V3/081" definition-exists="false" ipc-concordant="G01V3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the magnetic field is produced by the objects or geological structures </text><reference><text>characterised by the method of magnetic field measurement <class-ref scheme="cpc">G01R33/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V3/082" definition-exists="false" ipc-concordant="G01V3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating with fields produced by spontaneous potentials, e.g. electrochemical or produced by telluric currents </text><reference><text><class-ref scheme="cpc">G01V3/26</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V3/083" definition-exists="false" ipc-concordant="G01V3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlled source electromagnetic [CSEM] surveying</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="G01V3/084" definition-exists="false" ipc-concordant="G01V3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2003/084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sources</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="G01V3/085" definition-exists="false" ipc-concordant="G01V3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2003/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Receivers</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="G01V3/086" definition-exists="false" ipc-concordant="G01V3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2003/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Processing</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="G01V3/087" definition-exists="false" ipc-concordant="G01V3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the earth magnetic field being modified by the objects or geological structures</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="G01V3/088" definition-exists="false" ipc-concordant="G01V3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating with electric fields </text><reference><text><class-ref scheme="cpc">G01V3/082</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V3/10" definition-exists="false" ipc-concordant="G01V3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using induction 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="G01V3/101" definition-exists="false" ipc-concordant="G01V3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/101</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil </text><reference><text>measuring impedance or characteristics derived therefrom <class-ref scheme="cpc">G01R27/00</class-ref>, e.g. quality factor <class-ref scheme="cpc">G01R27/26</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="G01V3/102" definition-exists="false" ipc-concordant="G01V3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by measuring amplitude</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="G01V3/104" definition-exists="false" ipc-concordant="G01V3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/104</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using several coupled or uncoupled coils </text><reference><text><class-ref scheme="cpc">G01V3/101</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="G01V3/105" definition-exists="false" ipc-concordant="G01V3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>forming directly coupled primary and secondary coils or loops</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="G01V3/107" definition-exists="false" ipc-concordant="G01V3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using compensating coil or loop 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="G01V3/108" definition-exists="false" ipc-concordant="G01V3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the emitter and the receiver coils or loops being uncoupled by positioning them perpendicularly to each other</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="G01V3/12" definition-exists="false" ipc-concordant="G01V3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating with electromagnetic waves </text><CPC-specific-text><reference><text>operating with millimetre waves <class-ref scheme="cpc">G01V8/005</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="G01V3/14" definition-exists="false" ipc-concordant="G01V3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating with electron or nuclear magnetic resonance</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="G01V3/15" definition-exists="false" ipc-concordant="G01V3/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for use during transport, e.g. by a person, vehicle or boat</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V3/16" definition-exists="false" ipc-concordant="G01V3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G01V3/16</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>specially adapted for use from aircraft </text><reference><text><class-ref scheme="cpc">G01V3/165</class-ref> - <class-ref scheme="cpc">G01V3/175</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="G01V3/165" definition-exists="false" ipc-concordant="G01V3/165" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating with magnetic or electric fields produced or modified by the object or by the detecting device </text><reference><text>with electromagnetic waves <class-ref scheme="cpc">G01V3/17</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="G01V3/17" definition-exists="false" ipc-concordant="G01V3/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating with electromagnetic waves </text><CPC-specific-text><reference><text>operating with millimetre waves <class-ref scheme="cpc">G01V8/005</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V3/175" definition-exists="false" ipc-concordant="G01V3/175" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/175</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating with electron or nuclear magnetic resonance</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="G01V3/18" definition-exists="false" ipc-concordant="G01V3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for well-logging</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V3/20" definition-exists="false" ipc-concordant="G01V3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating with propagation of electric current</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01V3/22" definition-exists="false" ipc-concordant="G01V3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using dc</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="G01V3/24" definition-exists="false" ipc-concordant="G01V3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ac</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="G01V3/26" definition-exists="false" ipc-concordant="G01V3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device </text><reference><text>with electromagnetic waves <class-ref scheme="cpc">G01V3/30</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="G01V3/265" definition-exists="false" ipc-concordant="G01V3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operating with fields produced by spontaneous potentials, e.g. electrochemicals or produced by telluric currents</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="G01V3/28" definition-exists="false" ipc-concordant="G01V3/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using induction coils</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="G01V3/30" definition-exists="false" ipc-concordant="G01V3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating with electromagnetic waves</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="G01V3/32" definition-exists="false" ipc-concordant="G01V3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating with electron or nuclear magnetic resonance</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="G01V3/34" definition-exists="false" ipc-concordant="G01V3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transmitting data to recording or processing apparatus</text></title-part><title-part><text>Recording data</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="G01V3/36" definition-exists="false" ipc-concordant="G01V3/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recording data </text><reference><text><class-ref scheme="cpc">G01V3/34</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01V3/38" definition-exists="false" ipc-concordant="G01V3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V3/38</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Processing data, e.g. for analysis, for interpretation, for correction</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="G01V3/40" definition-exists="false" ipc-concordant="G01V3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V3/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for measuring magnetic field characteristics of the earth</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="G01V5/00" definition-exists="true" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V5/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01V5/0008" definition-exists="true" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/0008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detecting hidden objects, e.g. weapons, explosives </text><reference><text>sorting of materials or articles according to radioactive properties <class-ref scheme="cpc">B07C5/342</class-ref>; investigating or analysing materials by the use of wave or particle radiation <class-ref scheme="cpc">G01N23/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V5/0016" definition-exists="false" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01V5/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Active interrogation, i.e. using an external radiation source, e.g. using pulsed, continuous or cosmic rays</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="G01V5/0025" definition-exists="false" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Measuring scattered radiation</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="G01V5/0033" definition-exists="false" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mixed interrogation beams, e.g. using more than one type of radiation beam</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="G01V5/0041" definition-exists="false" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/0041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple energy techniques using one type of radiation, e.g. X-rays of different energies </text><reference><text>multi-beam applications, e.g. X-rays and neutrons <class-ref scheme="cpc">G01V5/0033</class-ref>; spectroscopic applications <class-ref scheme="cpc">G01V5/0016</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01V5/005" definition-exists="false" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using Tomography, e.g. CT or SPECT </text><reference><text>detector details in CT applications <class-ref scheme="cpc">G01T1/2985</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01V5/0058" definition-exists="false" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/0058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using stereoscopic means</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="G01V5/0066" definition-exists="false" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having relative motion between the source, detector and object other than by conveyor </text><reference><text><class-ref scheme="cpc">G01V5/005</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="G01V5/0069" definition-exists="false" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01V5/0069</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Measuring induced radiation, e.g. thermal neutron activation analysis </text><reference><text>investigating or analysing materials by the use of neutrons <class-ref scheme="cpc">G01N23/222</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V5/0075" definition-exists="false" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Passive interrogation </text><reference><text>for hand, feet or portals <class-ref scheme="cpc">G01T1/167</class-ref>; for contaminated surface areas <class-ref scheme="cpc">G01T1/169</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V5/0083" definition-exists="false" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>utilizing a network, e.g. a remote expert, accessing remote data or the like</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="G01V5/0091" definition-exists="false" ipc-concordant="G01V5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/0091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>detecting special nuclear material [SNM], e.g. Uranium-235, Uranium-233 or Plutonium-239</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="G01V5/02" definition-exists="false" ipc-concordant="G01V5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for surface logging, e.g. from aircraft</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V5/025" definition-exists="false" ipc-concordant="G01V5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for use from aircraft</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="G01V5/04" definition-exists="false" ipc-concordant="G01V5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for well-logging</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V5/045" definition-exists="false" ipc-concordant="G01V5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmitting data to recording or processing apparatus; Recording data</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="G01V5/06" definition-exists="false" ipc-concordant="G01V5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for detecting naturally radioactive minerals</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="G01V5/08" definition-exists="false" ipc-concordant="G01V5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G01V5/08</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>using primary nuclear radiation sources or X-rays </text><CPC-specific-text><reference><text>, e.g. for inducing radioactivity; investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays, neutrons <class-ref scheme="cpc">G01N23/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01V5/085" definition-exists="false" ipc-concordant="G01V5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using another radioactive source</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01V5/10" definition-exists="false" ipc-concordant="G01V5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using neutron sources </text><CPC-specific-text><reference><text>neutron generating tubes <class-ref scheme="cpc">H05H5/00</class-ref>; neutron sources using isotopes <class-ref scheme="cpc">G21G4/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01V5/101" definition-exists="false" ipc-concordant="G01V5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/101</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and detecting the secondary Y-rays produced in the surrounding layers of the bore hole</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="G01V5/102" definition-exists="false" ipc-concordant="G01V5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the neutron source being of the pulsed type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01V5/104" definition-exists="false" ipc-concordant="G01V5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/104</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and detecting secondary Y-rays as well as reflected or back-scattered neutrons</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="G01V5/105" definition-exists="false" ipc-concordant="G01V5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the neutron source being of the pulsed type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01V5/107" definition-exists="false" ipc-concordant="G01V5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and detecting reflected or back-scattered neutrons</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="G01V5/108" definition-exists="false" ipc-concordant="G01V5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the neutron source being of the pulsed type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01V5/12" definition-exists="false" ipc-concordant="G01V5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using gamma or X-ray sources </text><CPC-specific-text><reference><text>gamma sources using isotopes <class-ref scheme="cpc">G21G4/00</class-ref>; X-ray tubes <class-ref scheme="cpc">H01J35/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01V5/125" definition-exists="false" ipc-concordant="G01V5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and detecting the secondary gamma- or X-rays in different places along the bore hole</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="G01V5/14" definition-exists="false" ipc-concordant="G01V5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a combination of several sources, e.g. a neutron and a gamma source</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01V5/145" definition-exists="false" ipc-concordant="G01V5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V5/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a neutron source combined with a gamma- or X-ray source</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01V7/00" definition-exists="true" ipc-concordant="G01V7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measuring gravitational fields or waves</text></title-part><title-part><text>Gravimetric prospecting or detecting</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01V7/005" definition-exists="false" ipc-concordant="G01V7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G01V7/005</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>using a resonating body or device, e.g. string </text><reference><text><class-ref scheme="cpc">G01V7/08</class-ref> - <class-ref scheme="cpc">G01V7/12</class-ref> take precedence; measuring resonant frequency of mechanical vibrations <class-ref scheme="cpc">G01H13/00</class-ref>; measuring frequency <u>per se</u> <class-ref scheme="cpc">G01R23/00</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="G01V7/02" definition-exists="false" ipc-concordant="G01V7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V7/02</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="G01V7/04" definition-exists="true" ipc-concordant="G01V7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electric, photoelectric, or magnetic indicating or recording means</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="G01V7/06" definition-exists="false" ipc-concordant="G01V7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Analysis or interpretation of gravimetric records</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="G01V7/08" definition-exists="false" ipc-concordant="G01V7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V7/08</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using balances</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01V7/10" definition-exists="false" ipc-concordant="G01V7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V7/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using torsion balances, e.g. Eötvös balance</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="G01V7/12" definition-exists="false" ipc-concordant="G01V7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V7/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using pendulums</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="G01V7/14" definition-exists="false" ipc-concordant="G01V7/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V7/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using free-fall time</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="G01V7/16" definition-exists="true" ipc-concordant="G01V7/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V7/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for use on moving platforms, e.g. ship, aircraft</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="G01V8/00" definition-exists="true" ipc-concordant="G01V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V8/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Prospecting or detecting by optical means</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> This group <u>covers</u> the use of <CPC-specific-note>millimetre waves,</CPC-specific-note> infra-red, visible or ultra-violet light. </note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01V8/005" definition-exists="false" ipc-concordant="G01V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V8/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating with millimetre waves, e.g. measuring the black losey radiation</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="G01V8/02" definition-exists="false" ipc-concordant="G01V8/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V8/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Prospecting</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="G01V8/10" definition-exists="false" ipc-concordant="G01V8/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V8/10</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Detecting, e.g. by using light barriers </text><reference><text>by reflection from the object <class-ref scheme="cpc">G01S17/00</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="G01V8/12" definition-exists="false" ipc-concordant="G01V8/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V8/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using one transmitter and one receiver</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01V8/14" definition-exists="false" ipc-concordant="G01V8/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V8/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using reflectors</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="G01V8/16" definition-exists="false" ipc-concordant="G01V8/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V8/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using optical fibres</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="G01V8/18" definition-exists="false" ipc-concordant="G01V8/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V8/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using mechanical scanning systems</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="G01V8/20" definition-exists="false" ipc-concordant="G01V8/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V8/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using multiple transmitters or receivers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01V8/22" definition-exists="false" ipc-concordant="G01V8/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V8/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using reflectors</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="G01V8/24" definition-exists="false" ipc-concordant="G01V8/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V8/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using optical fibres</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="G01V8/26" definition-exists="false" ipc-concordant="G01V8/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V8/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using mechanical scanning systems</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="G01V9/00" definition-exists="true" ipc-concordant="G01V9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G01V9/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Prospecting or detecting by methods not provided for in groups <class-ref scheme="cpc">G01V1/00</class-ref> - <class-ref scheme="cpc">G01V8/00</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="G01V9/002" definition-exists="false" ipc-concordant="G01V9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V9/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using fields or radiation detectable only by persons susceptible therefor, e.g. radio-esthesis, dowsing</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="G01V9/005" definition-exists="false" ipc-concordant="G01V9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V9/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by thermal methods, e.g. after generation of heat by chemical reactions</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="G01V9/007" definition-exists="false" ipc-concordant="G01V9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V9/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by detecting gases or particles representative of underground layers at or near the surface </text><reference><text>analysing earth materials <class-ref scheme="cpc">G01N33/24</class-ref>; analysing gases <u>per se</u> <class-ref scheme="cpc">G01N</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="G01V9/02" definition-exists="false" ipc-concordant="G01V9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V9/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determining existence or flow of underground water</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="G01V11/00" definition-exists="true" ipc-concordant="G01V11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01V11/00</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Prospecting or detecting by methods combining techniques covered by two or more of main groups <class-ref scheme="cpc">G01V1/00</class-ref> - <class-ref scheme="cpc">G01V9/00</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="G01V11/002" definition-exists="false" ipc-concordant="G01V11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V11/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details, e.g. power supply systems for logging instruments, transmitting or recording data, specially adapted for well logging, also if the prospecting method is irrelevant </text><reference><text>means for transmitting well survey signals <class-ref scheme="cpc">E21B47/12</class-ref>; signal transmission systems in general <class-ref scheme="cpc">G08C</class-ref>; transmission in general <class-ref scheme="cpc">H04B</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="G01V11/005" definition-exists="false" ipc-concordant="G01V11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01V11/005</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Devices for positioning logging sondes with respect to the borehole wall </text><reference><text>centralising devices for drilling rods or pipes <class-ref scheme="cpc">E21B17/10</class-ref>; setting or locking tools in boreholes <class-ref scheme="cpc">E21B23/00</class-ref>; locating objects in boreholes <class-ref scheme="cpc">E21B47/09</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01V11/007" definition-exists="false" ipc-concordant="G01V11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V11/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the seismo-electric effect</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="G01V13/00" definition-exists="true" ipc-concordant="G01V13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V13/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups <class-ref scheme="cpc">G01V1/00</class-ref> – <class-ref scheme="cpc">G01V11/00</class-ref></text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01V15/00" definition-exists="true" ipc-concordant="G01V15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01V15/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Tags attached to, or associated with, an object, in order to enable detection of the object </text><reference><text>record carriers for use with machines having a detectable tag or marker <class-ref scheme="cpc">G06K19/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01V99/00" definition-exists="true" ipc-concordant="G01V99/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V99/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Subject matter not provided for in other groups of this subclass</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01V99/005" definition-exists="false" ipc-concordant="G01V99/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V99/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Geomodels or geomodelling, not related to particular measurements</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="true" level="6" additional-only="true" sort-key="G01V200/00" date-revised="2013-01-01" status="published"><classification-symbol>G01V2200/00</classification-symbol>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="G01V200/00" 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>G01V2200/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of seismic or acoustic prospecting or detecting in general</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G01V200/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2200/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Miscellaneous details</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01V200/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2200/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Clock synchronization-related issues</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="G01V200/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2200/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Quality control</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="G01V200/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2200/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Measure-while-drilling or logging-while-drilling</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="G01V210/00" 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>G01V2210/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of seismic processing or analysis</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G01V210/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aspects of acoustic signal generation or detection</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01V210/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Signal generation</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/121" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Active source</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01V210/1212" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1212</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shot</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="G01V210/1214" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1214</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Continuous</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="G01V210/1216" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1216</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Drilling-related</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="G01V210/123" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01V2210/123</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Passive source, e.g. microseismics</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01V210/1232" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1232</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Earthquakes</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="G01V210/1234" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1234</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hydrocarbon reservoir, e.g. spontaneous or induced fracturing</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="G01V210/1236" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1236</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Acoustic daylight, e.g. cultural noise</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="G01V210/125" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Virtual source</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="G01V210/127" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooperating multiple sources</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/129" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/129</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Source location</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01V210/1291" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1291</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Air</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="G01V210/1293" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1293</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sea</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="G01V210/1295" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1295</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Land surface</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="G01V210/1297" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1297</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sea bed</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="G01V210/1299" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1299</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Subsurface, e.g. in borehole or below weathering layer or mud line</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="G01V210/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Signal detection</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/142" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/142</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Receiver location</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01V210/1421" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1421</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Air</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="G01V210/1423" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1423</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sea</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="G01V210/1425" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1425</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Land surface</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="G01V210/1427" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1427</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sea bed</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="G01V210/1429" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/1429</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Subsurface, e.g. in borehole or below weathering layer or mud line</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="G01V210/144" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/144</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with functionally associated receivers, e.g. hydrophone and geophone pairs</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="G01V210/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Survey configurations</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/161" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/161</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vertical seismic profiling [VSP]</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="G01V210/163" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/163</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cross-well</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="G01V210/165" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Wide azimuth</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="G01V210/167" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/167</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Very long offset</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="G01V210/169" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/169</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sparse arrays</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G01V210/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Trace signal pre-filtering to select, remove or transform specific events or signal components, i.e. trace-in/trace-out </text><reference><text>removing noise <class-ref scheme="cpc">G01V2210/32</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01V210/21" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/21</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Frequency-domain filtering, e.g. band pass</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="G01V210/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Time-domain filtering</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="G01V210/23" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/23</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Wavelet filtering</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="G01V210/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multi-trace filtering</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/242" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/242</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>F-k filtering, e.g. ground roll</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="G01V210/244" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/244</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Radon transform</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="G01V210/25" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transform filter for merging or comparing traces from different surveys</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="G01V210/26" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modulation or demodulation, e.g. for continuous sources</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="G01V210/27" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/27</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other pre-filtering</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G01V210/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Noise handling </text><reference><text>trace signal pre-filtering <class-ref scheme="cpc">G01V2210/20</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01V210/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Noise reduction</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/322" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/322</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Trace stacking</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="G01V210/324" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/324</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Filtering</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01V210/3242" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/3242</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Flow noise</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="G01V210/3244" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/3244</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cultural noise</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="G01V210/3246" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/3246</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coherent noise, e.g. spatially coherent or predictable</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="G01V210/3248" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/3248</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Incoherent noise, e.g. white noise</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="G01V210/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Noise estimation </text><reference><text>quality control <class-ref scheme="cpc">G01V2200/14</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01V210/36" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Noise recycling, i.e. retrieving non-seismic information from noise</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="G01V210/38" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Noise characterisation or classification</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="G01V210/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transforming data representation </text><reference><text>for pre-filtering purposes <class-ref scheme="cpc">G01V2210/20</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01V210/41" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/41</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrival times, e.g. of P or S wave or first break</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="G01V210/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Waveform, i.e. using raw or pre-filtered trace data</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="G01V210/43" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/43</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Spectral</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="G01V210/44" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>F-k domain</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="G01V210/45" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/45</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>F-x or F-xy domain</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="G01V210/46" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Radon transform</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="G01V210/47" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/47</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Slowness, e.g. tau-pi</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="G01V210/48" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other transforms</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="G01V210/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Corrections or adjustments related to wave propagation </text><reference><text>noise handling <class-ref scheme="cpc">G01V2210/30</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01V210/51" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/51</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Migration</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/512" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/512</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pre-stack</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="G01V210/514" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/514</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Post-stack</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="G01V210/52" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Move-out correction</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/522" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/522</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dip move-out [DMO]</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="G01V210/53" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/53</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Statics correction, e.g. weathering layer or transformation to a datum</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/532" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/532</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dynamic changes in statics, e.g. sea waves or tidal influences</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="G01V210/54" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Borehole-related corrections</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/542" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/542</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Casing</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="G01V210/544" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/544</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Invasion zone</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="G01V210/55" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/55</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Array focusing</text></title-part><title-part><text>Phased arrays</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="G01V210/56" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>De-ghosting</text></title-part><title-part><text>Reverberation compensation</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="G01V210/57" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/57</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Trace interpolation or extrapolation, e.g. for virtual receiver</text></title-part><title-part><text>Anti-aliasing for missing receivers</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="G01V210/58" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Media-related</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/582" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/582</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dispersion</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="G01V210/584" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/584</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Attenuation</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="G01V210/586" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/586</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anisotropic media</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="G01V210/588" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/588</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-linear media</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="G01V210/59" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/59</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other corrections</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="G01V210/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Analysis</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01V210/61" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/61</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Analysis by combining or comparing a seismic data set with other data</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/612" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/612</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Previously recorded data, e.g. time-lapse or 4D</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01V210/6122" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6122</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tracking reservoir changes over time, e.g. due to production</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G01V210/6124" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6124</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Subsidence, i.e. upwards or downwards</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="G01V210/614" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/614</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Synthetically generated data</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="G01V210/616" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/616</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Data from specific type of measurement</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01V210/6161" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6161</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Seismic or acoustic, e.g. land or sea measurements</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="G01V210/6163" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6163</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electromagnetic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01V210/6165" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6165</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gravitational</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="G01V210/6167" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6167</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Nuclear</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="G01V210/6169" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6169</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using well-logging</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="G01V210/62" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Physical property of subsurface</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/622" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/622</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Velocity, density or impedance</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01V210/6222" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6222</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Velocity</text></title-part><title-part><text>travel time</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="G01V210/6224" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6224</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Density</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="G01V210/6226" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6226</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Impedance</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="G01V210/624" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/624</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reservoir parameters</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01V210/6242" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01V2210/6242</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Elastic parameters, e.g. Young, Lamé or Poisson</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="G01V210/6244" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6244</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Porosity</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="G01V210/6246" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6246</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Permeability</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="G01V210/6248" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/6248</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pore pressure</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="G01V210/663" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/663</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modeling production-induced effects</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01V210/679" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/679</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reverse-time modeling or coalescence modelling, i.e. starting from receivers</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G01V210/70" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other details related to processing</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01V210/72" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01V2210/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Real-time processing</text></title-part></class-title></classification-item>
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