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<?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="G11B" definition-exists="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER </text><reference><text>recording measured values in a way that does not require playback through a transducer <class-ref scheme="cpc">G01D9/00</class-ref>; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards <class-ref scheme="cpc">G06K</class-ref>; transferring data from one type of record carrier to another <class-ref scheme="cpc">G06K1/18</class-ref>; circuits for coupling output of reproducer to radio receiver <class-ref scheme="cpc">H04B1/20</class-ref>; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor <class-ref scheme="cpc">H04R</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> This subclass <u>covers</u> : <subnote type="bullet"><note-paragraph>recording or playback of information by relative movement between a record track and a transducer, the transducer directly producing, or being directly actuated by, modulation in the track being recorded or played-back, and the extent of modulation corresponding to the signal being recorded or played-back; </note-paragraph><note-paragraph>apparatus and machines for recording or playback, and parts thereof such as heads; </note-paragraph><note-paragraph>record carriers for use with such apparatus and machines; </note-paragraph><note-paragraph>associated working of other apparatus with such apparatus and machines; </note-paragraph><note-paragraph><CPC-specific-note>relative positioning or movement of transducers and record carriers before, during or after transducing operation, e.g. for accessing record carriers or parts thereof, or for track change, selection or acquisition or for track following or for accessing parts of tracks;</CPC-specific-note></note-paragraph><note-paragraph><CPC-specific-note>driving or moving of heads or record carriers or both heads and record carriers for increasing, maintaining or decreasing the relative speed before, during or after transducing operation</CPC-specific-note></note-paragraph></subnote></note-paragraph><note-paragraph> In this subclass, the following terms or expressions are used with the meanings indicated : <subnote type="bullet"><note-paragraph>"head" includes any means for converting sinusoidal or non-sinusoidal electric wave-forms into variations of the physical condition of at least the adjacent surface of the record carrier, or <u>vice versa</u>; </note-paragraph><note-paragraph>"record carrier" means a body, such as a cylinder, disc, card, tape, or wire, capable of permanently holding information, which can be read-off by a sensing element movable relatively to the record carrier. </note-paragraph></subnote></note-paragraph><note-paragraph> Documents concerning relative positioning or movement of transducers and record carriers are classified in groups <class-ref scheme="cpc">G11B3/00</class-ref> - <class-ref scheme="cpc">G11B7/00</class-ref> and <class-ref scheme="cpc">G11B21/00</class-ref> when only the transducer is controlled and in groups <class-ref scheme="cpc">G11B15/00</class-ref>, <class-ref scheme="cpc">G11B17/00</class-ref> and <class-ref scheme="cpc">G11B19/00</class-ref> when only the record carrier is controlled. When both record carrier and head are controlled, the documents are classified in <class-ref scheme="cpc">G11B15/1808</class-ref>, <class-ref scheme="cpc">G11B15/1816</class-ref>, <class-ref scheme="cpc">G11B19/00</class-ref> and <class-ref scheme="cpc">G11B27/002</class-ref>. <br/> When a plurality of record carriers are controlled, the documents are classified in <class-ref scheme="cpc">G11B15/68</class-ref>, <class-ref scheme="cpc">G11B17/08</class-ref>, <class-ref scheme="cpc">G11B17/22</class-ref> and <class-ref scheme="cpc">G11B27/002</class-ref>. </note-paragraph><note-paragraph>By "access" is meant an operation including a relative movement for positioning between record carrier and head before, during or after transducing; this operation including "seek", "select", "change", "acquire" and "follow" functions for at least a part of a track on at least one record carrier. By "programmed access" is meant a sequence of access operations the result of the sequence being to acquire a wanted sequence of parts of tracks or a wanted sequence of tracks. Relative movement between head and record carrier also covers the movement of a coupling beam such as a light beam between the head and a stationary record carrier.</note-paragraph><note-paragraph>"Movement of the head" also covers any virtual movement or any physical movement such as obtained by switching between successive transducing parts of the head or by moving the transducing zone of the head, i.e. by "scanning". If different transducing parts of the head are switchable, the number of transducing parts should be much smaller than the number of individual storage areas of the record carrier.</note-paragraph><note-paragraph>Attention is drawn to the notes of subclass <class-ref scheme="cpc">G11C</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">G11B5/673</class-ref> </entry><entry> covered by </entry><entry><class-ref scheme="cpc">G11B5/66</class-ref> and <class-ref scheme="cpc">G11B5/672</class-ref> - <class-ref scheme="cpc">G11B5/678</class-ref></entry></row><row><entry><class-ref scheme="ipc">G11B5/738</class-ref> </entry><entry> covered by </entry><entry><class-ref scheme="cpc">G11B5/73</class-ref>, <class-ref scheme="cpc">G11B5/733</class-ref>, <class-ref scheme="cpc">G11B5/7334</class-ref> and <class-ref scheme="cpc">G11B5/736</class-ref> - <class-ref scheme="cpc">G11B5/7377</class-ref></entry></row><row><entry><class-ref scheme="ipc">G11B7/30</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">G11B7/00</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="G11B3/00" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11B3/00" definition-exists="true" ipc-concordant="G11B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B3/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits</text></title-part><title-part><text>Reproducing by mechanical sensing</text></title-part><title-part><text>Record carriers therefor </text><reference><text><class-ref scheme="cpc">G11B11/00</class-ref>, </text><CPC-specific-text><text><class-ref scheme="cpc">G11B13/00</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="8" additional-only="false" sort-key="G11B3/001" definition-exists="false" ipc-concordant="G11B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with vibrating mechanical coupling means between pick-up element and sound producing element</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B3/002" definition-exists="false" ipc-concordant="G11B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>element with stationary record carriers</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="G11B3/003" definition-exists="false" ipc-concordant="G11B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Devices for transmitting, directing, amplifying sound </text><reference><text>in general <class-ref scheme="cpc">G10K11/18</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="G11B3/005" definition-exists="false" ipc-concordant="G11B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>through hollow arms</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="G11B3/006" definition-exists="false" ipc-concordant="G11B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using horns</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="G11B3/007" definition-exists="false" ipc-concordant="G11B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B3/007</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Devices for controlling sound, e.g. using acoustical impedances, using valves</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="G11B3/008" definition-exists="false" ipc-concordant="G11B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for digital information</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="G11B3/02" definition-exists="false" ipc-concordant="G11B3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B3/02</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Arrangements of heads</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B3/04" definition-exists="false" ipc-concordant="G11B3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B3/04</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Multiple, convertible, or alternative transducing arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B3/06" definition-exists="false" ipc-concordant="G11B3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determining or indicating positions of head</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="G11B3/08" definition-exists="false" ipc-concordant="G11B3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers </text><CPC-specific-text><reference><text>for transducing <class-ref scheme="cpc">G11B3/12</class-ref>, <class-ref scheme="cpc">G11B3/34</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B3/085" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-11-01" status="published"><classification-symbol>G11B3/085</classification-symbol><class-title date-revised="2015-11-01"><title-part><text>using automatic means </text><reference><text><class-ref scheme="cpc">G11B3/095</class-ref> takes precedence </text><CPC-specific-text><text>; if particularly adapted for record-changers <u>see</u> <class-ref scheme="cpc">G11B17/16</class-ref> and subgroups</text></CPC-specific-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="G11B3/08503" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08503</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of drive of the head</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="G11B3/08506" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08506</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for pivoting pick-up arms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B3/08509" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08509</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical detecting means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B3/08512" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08512</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using optical detecting means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B3/08516" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08516</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetic detecting 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="12" additional-only="false" sort-key="G11B3/08519" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08519</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for pick-up arms moving parallel to itself</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B3/08522" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08522</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical detecting means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B3/08525" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08525</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using optical detecting means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B3/08529" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08529</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetic or electric detecting 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="12" additional-only="false" sort-key="G11B3/08532" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08532</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for fixed arms carrying a movable head</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="G11B3/08535" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08535</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Driving the head</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="G11B3/08538" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08538</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the head being driven by the same means as the record can</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B3/08541" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08541</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for pivoting pick-up arms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B3/08545" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08545</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>driven by cams</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B3/08548" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08548</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using friction coupling</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="G11B3/08551" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08551</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for the horizontal movement only</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="13" additional-only="false" sort-key="G11B3/08554" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08554</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for pick-up arms moving parallel to itself</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B3/08558" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08558</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>driven by belt or analogous element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B3/08561" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08561</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>driven by non-skip driving means, e.g. lead screw</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B3/08564" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08564</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the head being driven by means independent of the record carrier driving means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B3/08567" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08567</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for pivoting pick-up arms</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B3/0857" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/0857</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>driven by means which support the pick-up arm</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B3/08574" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08574</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the supporting element being different from the rotation-axes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="G11B3/08577" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08577</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for the vertical movement only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="17" additional-only="false" sort-key="G11B3/0858" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/0858</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="17" additional-only="false" sort-key="G11B3/08583" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08583</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrical/magnetic means</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="13" additional-only="false" sort-key="G11B3/08587" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08587</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for pick-up arm moving parallel to itself</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B3/0859" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/0859</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>driven by belt or analogous element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B3/08593" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08593</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>driven by non-skip driving means, e.g. lead screw</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B3/08596" definition-exists="false" ipc-concordant="G11B3/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/08596</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for fixed arms carrying a movable head</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B3/09" definition-exists="false" ipc-concordant="G11B3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using manual means only </text><reference><text><class-ref scheme="cpc">G11B3/095</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="G11B3/091" definition-exists="false" ipc-concordant="G11B3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetic means </text><reference><text><class-ref scheme="cpc">G11B3/093</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B3/092" definition-exists="false" ipc-concordant="G11B3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means </text><reference><text><class-ref scheme="cpc">G11B3/093</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B3/093" definition-exists="false" ipc-concordant="G11B3/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means coupled to the cover</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="G11B3/095" definition-exists="false" ipc-concordant="G11B3/095" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/095</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for repeating a part of the record</text></title-part><title-part><text>for beginning or stopping at a desired point of the record</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B3/0952" definition-exists="false" ipc-concordant="G11B3/095" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/0952</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using automatic means</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="G11B3/0955" definition-exists="false" ipc-concordant="G11B3/095" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/0955</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means for detecting the end of the recording</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B3/0957" definition-exists="false" ipc-concordant="G11B3/095" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/0957</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using optical means for detecting the end of the recording or the desired point thereof</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B3/10" definition-exists="false" ipc-concordant="G11B3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arranging, supporting, or driving of heads or of transducers relatively to record carriers </text><CPC-specific-text><reference><text>guiding record carriers <class-ref scheme="cpc">G11B17/00</class-ref>, driving record carriers <class-ref scheme="cpc">G11B19/00</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="G11B3/12" definition-exists="false" ipc-concordant="G11B3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-10-01" status="published"><classification-symbol>G11B3/12</classification-symbol><class-title date-revised="2015-10-01"><title-part><text>Supporting in balanced, counterbalanced or loaded operative position </text><CPC-specific-text><text>during transducing</text></CPC-specific-text><text>, e.g. loading in direction of traverse</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B3/121" definition-exists="false" ipc-concordant="G11B3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>By using mechanical means not provided for in <class-ref scheme="cpc">G11B3/14</class-ref>, <class-ref scheme="cpc">G11B3/20</class-ref>, e.g. using cams</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="G11B3/122" definition-exists="false" ipc-concordant="G11B3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B3/122</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Providing horizontal force, e.g. anti-skating </text><reference><text><class-ref scheme="cpc">G11B3/124</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B3/124" definition-exists="false" ipc-concordant="G11B3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/124</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Damping means therefor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B3/125" definition-exists="false" ipc-concordant="G11B3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using electric or magnetic means</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="G11B3/127" definition-exists="false" ipc-concordant="G11B3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Providing horizontal force, e.g. anti-skating force </text><reference><text><class-ref scheme="cpc">G11B3/128</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B3/128" definition-exists="false" ipc-concordant="G11B3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/128</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Damping means therefor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B3/14" definition-exists="false" ipc-concordant="G11B3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using effects of gravity or inertia, e.g. counterweight </text><reference><text><class-ref scheme="cpc">G11B3/28</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B3/145" definition-exists="false" ipc-concordant="G11B3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B3/145</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Providing horizontal force, e.g. anti-skating force </text><reference><text><class-ref scheme="cpc">G11B3/18</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B3/16" definition-exists="false" ipc-concordant="G11B3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>adjustable</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B3/18" definition-exists="false" ipc-concordant="G11B3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Damping by using viscosity effect</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="G11B3/20" definition-exists="false" ipc-concordant="G11B3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by elastic means, e.g. spring </text><reference><text><class-ref scheme="cpc">G11B3/28</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B3/22" definition-exists="false" ipc-concordant="G11B3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-02-04" status="published"><classification-symbol>G11B3/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>adjustable</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B3/24" definition-exists="false" ipc-concordant="G11B3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>acting to decrease pressure on record</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B3/26" definition-exists="false" ipc-concordant="G11B3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>acting to increase pressure on record</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="G11B3/28" definition-exists="false" ipc-concordant="G11B3/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-02-04" status="published"><classification-symbol>G11B3/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>providing transverse bias parallel to record</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> <u>see</u> provisionally also <class-ref scheme="cpc">G11B3/14</class-ref>, <class-ref scheme="cpc">G11B3/20</class-ref> ) </note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B3/30" definition-exists="false" ipc-concordant="G11B3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supporting in an inoperative position</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B3/31" definition-exists="false" ipc-concordant="G11B3/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/31</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Construction of arms </text><CPC-specific-text><reference><text>for transmitting, directing or amplifying sound <class-ref scheme="cpc">G11B3/003</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="11" additional-only="false" sort-key="G11B3/32" definition-exists="false" ipc-concordant="G11B3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Construction or arrangement of support pillars</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="G11B3/34" definition-exists="false" ipc-concordant="G11B3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Driving or guiding during transducing operation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B3/36" definition-exists="false" ipc-concordant="G11B3/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Automatic-feed mechanisms producing progressive transducing traverse across record carriers otherwise than by grooves, e.g. by lead-screw</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="G11B3/38" definition-exists="false" ipc-concordant="G11B3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Guiding, e.g. constructions or arrangements providing linear or other special tracking characteristics</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="G11B3/40" definition-exists="false" ipc-concordant="G11B3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Driving of heads relatively to stationary record carriers for transducing</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="G11B3/42" definition-exists="false" ipc-concordant="G11B3/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with provision for adaptation or interchange of heads</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B3/44" definition-exists="false" ipc-concordant="G11B3/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Styli, e.g. sapphire, diamond</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B3/445" definition-exists="false" ipc-concordant="G11B3/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Styli particularly adapted for sensing video discs</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="G11B3/46" definition-exists="false" ipc-concordant="G11B3/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructions or forms </text><CPC-specific-text><text>Disposition or mounting</text></CPC-specific-text><text>, e.g. attachment of point to shank </text><CPC-specific-text><reference><text>attachment of stylus directly to transducer <class-ref scheme="cpc">H04R1/16</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="G11B3/48" definition-exists="false" ipc-concordant="G11B3/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B3/48</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Needles</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="G11B3/50" definition-exists="false" ipc-concordant="G11B3/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anvils or other supports opposing stylus forces</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="G11B3/52" definition-exists="false" ipc-concordant="G11B3/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements permitting styli to yield under excessive pressure</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B3/54" definition-exists="false" ipc-concordant="G11B3/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B3/54</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Storing</text></title-part><title-part><text>Manipulating, e.g. feeding styli to and from heads</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="G11B3/56" definition-exists="false" ipc-concordant="G11B3/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sharpening </text><reference><text>grinding <class-ref scheme="cpc">B24B3/00</class-ref>, <class-ref scheme="cpc">B24B19/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B3/58" definition-exists="true" ipc-concordant="G11B3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B3/58</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Cleaning record carriers or styli, e.g. removing shavings or dust </text><CPC-specific-text><text>or electrostatic charges</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B3/5809" definition-exists="false" ipc-concordant="G11B3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/5809</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>during transducing operation</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="G11B3/5818" definition-exists="false" ipc-concordant="G11B3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/5818</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for record carriers</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="G11B3/5827" definition-exists="false" ipc-concordant="G11B3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/5827</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using means contacting the record carrier</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="G11B3/5836" definition-exists="false" ipc-concordant="G11B3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/5836</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>means connected to the pick-up arm or head</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B3/5845" definition-exists="false" ipc-concordant="G11B3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/5845</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>means connected to a separate arm</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="G11B3/5854" definition-exists="false" ipc-concordant="G11B3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/5854</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using means not contacting the record carrier</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="G11B3/5863" definition-exists="false" ipc-concordant="G11B3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/5863</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>connected to the pick-up arm or head</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B3/5872" definition-exists="false" ipc-concordant="G11B3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/5872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>connected to a separate arm</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="G11B3/5881" definition-exists="false" ipc-concordant="G11B3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/5881</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for styli or needles only</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B3/589" definition-exists="false" ipc-concordant="G11B3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/589</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>before or after transducing operation</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="G11B3/60" definition-exists="false" ipc-concordant="G11B3/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B3/60</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Turntables for record carriers</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> contains no documents, <u>see</u> <class-ref scheme="cpc">G11B19/2009</class-ref></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B3/61" definition-exists="false" ipc-concordant="G11B3/61" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/61</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Damping of vibrations of record carriers on turntables</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> <u>see</u> provisionally also <class-ref scheme="cpc">G11B3/60</class-ref>, <class-ref scheme="cpc">G11B3/589</class-ref> and <class-ref scheme="cpc">G11B17/02</class-ref>; contains no documents, <u>see</u> <class-ref scheme="cpc">G11B19/2018</class-ref></note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B3/64" definition-exists="false" ipc-concordant="G11B3/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Re-recording, i.e. transcribing information from one grooved record carrier on to one or more similar or dissimilar record carriers </text><CPC-specific-text><reference><text>by varying the order of the information <class-ref scheme="cpc">G11B27/029</class-ref>, <class-ref scheme="cpc">G11B27/036</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="G11B3/66" definition-exists="false" ipc-concordant="G11B3/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Erasing information, e.g. for reuse of record carrier</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="G11B3/68" definition-exists="false" ipc-concordant="G11B3/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Record carriers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B3/682" definition-exists="false" ipc-concordant="G11B3/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B3/682</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>comprising protective coatings, e.g. anti static, anti-friction</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="G11B3/685" definition-exists="false" ipc-concordant="G11B3/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Intermediate mediums</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="G11B3/687" definition-exists="false" ipc-concordant="G11B3/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/687</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Testing thereof </text><reference><text>investigating chemical or physical properties of materials <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="9" additional-only="false" sort-key="G11B3/70" definition-exists="false" ipc-concordant="G11B3/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B3/70</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>characterised by the selection of material or structure</text></title-part><title-part><text>Processes or apparatus specially adapted for manufacturing record carriers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B3/702" definition-exists="false" ipc-concordant="G11B3/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/702</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for video discs with grooves </text><reference><text><class-ref scheme="cpc">G11B3/705</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="G11B3/705" definition-exists="false" ipc-concordant="G11B3/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/705</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the selection of the material only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B3/707" definition-exists="false" ipc-concordant="G11B3/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/707</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for video discs with grooves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B3/72" definition-exists="false" ipc-concordant="G11B3/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Groove formations, e.g. run-in groove, run-out groove</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B3/74" definition-exists="false" ipc-concordant="G11B3/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple output tracks, e.g. binaural stereophonic</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="G11B3/76" definition-exists="false" ipc-concordant="G11B3/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/76</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>forming part of cinematograph films</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="G11B3/78" definition-exists="false" ipc-concordant="G11B3/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple-track arrangements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B3/80" definition-exists="false" ipc-concordant="G11B3/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>incorporating subsidiary guide means for heads, other than modulated grooves</text></title-part><title-part><text>Part-formed unmodulated grooves for conversion into transducing grooves</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="G11B3/90" definition-exists="false" ipc-concordant="G11B3/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B3/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means indicating prior or unauthorised use</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11B5/00" definition-exists="true" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B5/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recording by magnetisation or demagnetisation of a record carrier</text></title-part><title-part><text>Reproducing by magnetic means</text></title-part><title-part><text>Record carriers therefor </text><reference><text><class-ref scheme="cpc">G11B11/00</class-ref> </text><CPC-specific-text><text>and <class-ref scheme="cpc">G11B13/00</class-ref></text></CPC-specific-text><text> take precedence</text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Subgroups <class-ref scheme="cpc">G11B5/02</class-ref> - <class-ref scheme="cpc">G11B5/86</class-ref> take precedence over subgroups <class-ref scheme="cpc">G11B5/004</class-ref> - <class-ref scheme="cpc">G11B5/016</class-ref></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11B5/0002" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Special dispositions or recording techniques</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B5/0005" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements, methods or circuits</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="G11B5/0008" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Magnetic conditionning of heads, e.g. biasing</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="G11B5/001" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B5/0013" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of transducers, e.g. linearisation, equalisation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B5/0016" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of magnetoresistive transducers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B5/0018" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by current biasing control or regulation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B5/0021" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal</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="G11B5/0024" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Microwave assisted recording</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B5/0026" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pulse recording</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="G11B5/0029" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetisation components of the recording layer disposed mainly perpendicularly to the record carrier surface</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B5/0032" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transducing means or record carriers including or interacting with each other through interposition of, a physically controllable magnetic flux masking or focusing element</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="G11B5/0034" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0034</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>switchable at least locally between two different physical states, e.g. magnetic and non-magnetic</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B5/0037" definition-exists="false" ipc-concordant="G11B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/0037</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using superconductive elements</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="G11B5/004" definition-exists="true" ipc-concordant="G11B5/004" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recording on, or reproducing or erasing from, magnetic drums </text><reference><text><class-ref scheme="cpc">G11B19/00</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="G11B5/008" definition-exists="true" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recording on, or reproducing or erasing from, magnetic tapes, </text><CPC-specific-text><text>sheets, e.g. cards,</text></CPC-specific-text><text> or wires </text><reference><text><class-ref scheme="cpc">G11B15/00</class-ref> </text><CPC-specific-text><text><class-ref scheme="cpc">G11B19/00</class-ref></text></CPC-specific-text><text> take precedence; </text><CPC-specific-text><text>bulk transferring of information magnetisation for re-recording <class-ref scheme="cpc">G11B5/865</class-ref>; marking record carriers in digital fashion <class-ref scheme="cpc">G06K</class-ref></text></CPC-specific-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="G11B5/00804" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00804</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>magnetic sheets </text><reference><text>rotating sheets <class-ref scheme="cpc">G11B5/012</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="G11B5/00808" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>magnetic cards</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="G11B5/00813" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00813</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>magnetic tapes</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="G11B5/00817" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00817</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on longitudinal tracks only, e.g. for serpentine format recording</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="G11B5/00821" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00821</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using stationary heads</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="G11B5/00826" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a plurality of single poles or gaps or groups thereof operative at the same time</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/0083" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for parallel information processing, e.g. PCM recording</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/00834" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00834</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using virtual scanning heads</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="G11B5/00839" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00839</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using cyclically driven heads providing segmented tracks</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="G11B5/00843" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/00843</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>allowing digital compact cassette [DCC] format recording</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="G11B5/00847" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00847</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on transverse tracks </text><reference><text><class-ref scheme="cpc">G11B5/00878</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="G11B5/00852" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00852</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using stationary heads</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="G11B5/00856" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00856</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a plurality of single poles or gaps or groups thereof operative in time sequence</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="G11B5/0086" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/0086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using cyclically driven heads providing segmented tracks</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="G11B5/00865" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00865</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for transducing on more than one segment simultaneously</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/00869" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00869</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the segments being disposed in different lateral zones of the tape</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/00873" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00873</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the segments being disposed in different longitudinal zones of the tape</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/00878" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00878</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>transducing different track configurations or formats on the same tape</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="G11B5/00882" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00882</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>configurations only, e.g. longitudinal and transverse</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="G11B5/00886" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00886</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>simultaneously</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="G11B5/00891" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00891</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>formats only, e.g. analog and digital</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="G11B5/00895" definition-exists="false" ipc-concordant="G11B5/008" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/00895</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>simultaneously</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B5/012" definition-exists="true" ipc-concordant="G11B5/012" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-02-01" status="published"><classification-symbol>G11B5/012</classification-symbol><class-title date-revised="2017-02-01"><title-part><text>Recording on, or reproducing or erasing from, magnetic disks </text><reference><text><class-ref scheme="cpc">G11B17/00</class-ref>, <class-ref scheme="cpc">G11B19/00</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/016" definition-exists="false" ipc-concordant="G11B5/016" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/016</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using magnetic foils</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="G11B5/02" definition-exists="true" ipc-concordant="G11B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B5/02</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Recording, reproducing, or erasing methods</text></title-part><title-part><text>Read, write or erase circuits therefor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/022" definition-exists="false" ipc-concordant="G11B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>H-Bridge head driver circuit, the "H" configuration allowing to inverse the current direction in the head</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="G11B5/024" definition-exists="false" ipc-concordant="G11B5/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Erasing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/0245" definition-exists="false" ipc-concordant="G11B5/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/0245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bulk erasing</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="G11B5/027" definition-exists="false" ipc-concordant="G11B5/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Analogue recording</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/0275" definition-exists="false" ipc-concordant="G11B5/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/0275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Boundary displacement recording</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="G11B5/03" definition-exists="false" ipc-concordant="G11B5/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Biasing</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="G11B5/035" definition-exists="false" ipc-concordant="G11B5/035" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/035</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Equalising</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="G11B5/09" definition-exists="false" ipc-concordant="G11B5/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Digital recording</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="G11B5/10" definition-exists="true" ipc-concordant="G11B5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structure or manufacture of housings or shields for heads</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/102" definition-exists="false" ipc-concordant="G11B5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacture of housing</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="G11B5/105" definition-exists="false" ipc-concordant="G11B5/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mounting of head within housing </text><CPC-specific-text><text>or assembling of head and housing </text><reference><text><class-ref scheme="cpc">G11B5/3103</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="G11B5/11" definition-exists="false" ipc-concordant="G11B5/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shielding of head against electric or magnetic fields</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/112" definition-exists="false" ipc-concordant="G11B5/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/112</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacture of shielding device</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="G11B5/115" definition-exists="false" ipc-concordant="G11B5/115" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/115</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shielding devices arranged between heads or windings </text><reference><CPC-specific-text><text><class-ref scheme="cpc">G11B5/265</class-ref></text></CPC-specific-text><text> , <class-ref scheme="cpc">G11B5/29</class-ref> take precedence</text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B5/127" definition-exists="true" ipc-concordant="G11B5/127" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structure or manufacture of heads, e.g. inductive</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/1272" definition-exists="false" ipc-concordant="G11B5/127" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/1272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Assembling or shaping of elements </text><reference><text><class-ref scheme="cpc">G11B5/1278</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="G11B5/1274" definition-exists="false" ipc-concordant="G11B5/127" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/1274</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with "composite" cores, i.e. cores composed in some parts of magnetic particles and in some other parts of magnetic metal layers</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="G11B5/1276" definition-exists="false" ipc-concordant="G11B5/127" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/1276</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including at least one magnetic thin film</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="G11B5/1278" definition-exists="false" ipc-concordant="G11B5/127" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/1278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for magnetisations perpendicular to the surface of the record carrier</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="G11B5/133" definition-exists="false" ipc-concordant="G11B5/133" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B5/133</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>with cores composed of particles, e.g. with dust cores, with ferrite cores </text><CPC-specific-text><text>with cores composed of isolated magnetic particles </text><reference><text>in thin films <class-ref scheme="cpc">G11B5/31</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="G11B5/1335" definition-exists="false" ipc-concordant="G11B5/133" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/1335</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Assembling or shaping of 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="G11B5/147" definition-exists="false" ipc-concordant="G11B5/147" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/147</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with cores being composed of metal sheets, i.e. laminated cores </text><CPC-specific-text><text>with cores composed of isolated magnetic layers, e.g. sheets </text><reference><text>in thin films <class-ref scheme="cpc">G11B5/31</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="G11B5/1475" definition-exists="false" ipc-concordant="G11B5/147" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/1475</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Assembling or shaping of elements </text><reference><text><class-ref scheme="cpc">G11B5/153</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="G11B5/153" definition-exists="false" ipc-concordant="G11B5/153" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/153</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with tape-wound cores</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="G11B5/17" definition-exists="false" ipc-concordant="G11B5/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Construction or disposition of windings</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="G11B5/187" definition-exists="false" ipc-concordant="G11B5/187" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/187</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium</text></title-part><title-part><text>Pole pieces</text></title-part><title-part><text>Gap features </text><reference><text><class-ref scheme="cpc">G11B5/265</class-ref>, </text><CPC-specific-text><text><class-ref scheme="cpc">G11B5/29</class-ref></text></CPC-specific-text><text> , <class-ref scheme="cpc">G11B5/31</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="G11B5/1871" definition-exists="false" ipc-concordant="G11B5/187" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/1871</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shaping or contouring of the transducing or guiding surface</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="G11B5/1872" definition-exists="false" ipc-concordant="G11B5/187" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/1872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for improving the form of the electrical signal transduced, e.g. compensation of "contour effect"</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="G11B5/1874" definition-exists="false" ipc-concordant="G11B5/187" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/1874</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for composite pole pieces, e.g. for avoiding "pseudo-gap"</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="G11B5/1875" definition-exists="false" ipc-concordant="G11B5/187" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/1875</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>"Composite" pole pieces, i.e. poles composed in some parts of magnetic particles and in some other parts of magnetic metal layers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/1877" definition-exists="false" ipc-concordant="G11B5/187" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/1877</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including at least one magnetic thin film</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="G11B5/1878" definition-exists="false" ipc-concordant="G11B5/187" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/1878</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>disposed immediately adjacent to the transducing gap, e.g. "Metal-In-Gap" structure</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="G11B5/193" definition-exists="false" ipc-concordant="G11B5/193" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/193</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the pole pieces being ferrite </text><CPC-specific-text><text>or other magnetic particles </text><reference><text><class-ref scheme="cpc">G11B5/1871</class-ref> takes precedence; in thin film <class-ref scheme="cpc">G11B5/31</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="G11B5/21" definition-exists="false" ipc-concordant="G11B5/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/21</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the pole pieces being of ferrous sheet metal </text><CPC-specific-text><text>or other magnetic layers </text><reference><text><class-ref scheme="cpc">G11B5/1871</class-ref> takes precedence; in thin film <class-ref scheme="cpc">G11B5/31</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="G11B5/23" definition-exists="false" ipc-concordant="G11B5/23" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/23</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gap features </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B5/1871</class-ref>, <class-ref scheme="cpc">G11B5/1875</class-ref>, <class-ref scheme="cpc">G11B5/265</class-ref>, <class-ref scheme="cpc">G11B5/29</class-ref>, <class-ref scheme="cpc">G11B5/488</class-ref> and subgroups, <class-ref scheme="cpc">G11B5/4907</class-ref> and subgroups, <class-ref scheme="cpc">G11B5/4969</class-ref> and subgroups take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/232" definition-exists="false" ipc-concordant="G11B5/23" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/232</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacture of gap</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/235" definition-exists="false" ipc-concordant="G11B5/235" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/235</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Selection of material for gap filler </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B5/232</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/245" definition-exists="true" ipc-concordant="G11B5/245" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B5/245</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>comprising means for controlling the reluctance of the magnetic circuit </text><CPC-specific-text><text>in a head with single gap, for co-operation with one track</text></CPC-specific-text><text> </text><reference><text><class-ref scheme="cpc">G11B5/255</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="G11B5/2452" definition-exists="false" ipc-concordant="G11B5/245" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/2452</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the dimensions of the effective gap are controlled</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="G11B5/2455" definition-exists="false" ipc-concordant="G11B5/245" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/2455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the magnetic circuit including at least one magnetic thin film of controllable properties </text><reference><text>for scanning <class-ref scheme="cpc">G11B5/4938</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/2457" definition-exists="false" ipc-concordant="G11B5/245" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/2457</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>disposed immediately adjacent to the gap </text><reference><text>"composite" pole pieces <class-ref scheme="cpc">G11B5/1877</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="10" additional-only="false" sort-key="G11B5/255" definition-exists="false" ipc-concordant="G11B5/255" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/255</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising means for protection against wear </text><CPC-specific-text><reference><text>in thin film structures <class-ref scheme="cpc">G11B5/3106</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="G11B5/265" definition-exists="false" ipc-concordant="G11B5/265" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track </text><reference><text><class-ref scheme="cpc">G11B5/33</class-ref> takes precedence </text><CPC-specific-text><text>in thin film structures <class-ref scheme="cpc">G11B5/31</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/2651" definition-exists="false" ipc-concordant="G11B5/265" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/2651</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacture</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="G11B5/2652" definition-exists="false" ipc-concordant="G11B5/265" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/2652</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with more than one gap simultaneously operative </text><reference><text>with controlled single gap <class-ref scheme="cpc">G11B5/245</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="G11B5/2654" definition-exists="false" ipc-concordant="G11B5/265" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/2654</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for recording or erasing</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="G11B5/2655" definition-exists="false" ipc-concordant="G11B5/265" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/2655</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with all the gaps disposed within the track or "guard band" between tracks, e.g. with erase gaps operative on track edges, with wide erase gap followed by narrow write gap</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/2657" definition-exists="false" ipc-concordant="G11B5/265" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/2657</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>all the gaps having the same dimension in the direction transverse to the track direction</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/2658" definition-exists="false" ipc-concordant="G11B5/265" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/2658</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for recording with premagnetization or biasing of record carrier or head</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/29" definition-exists="false" ipc-concordant="G11B5/29" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/29</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structure or manufacture of unitary devices formed of plural heads for more than one track </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B5/33</class-ref>, <class-ref scheme="cpc">G11B5/49</class-ref> and subgroups take precedence; in thin film structure <class-ref scheme="cpc">G11B5/31</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="G11B5/295" definition-exists="false" ipc-concordant="G11B5/29" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/295</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacture</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="G11B5/31" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/31</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using thin films </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B5/1274</class-ref>, <class-ref scheme="cpc">G11B5/1278</class-ref>, <class-ref scheme="cpc">G11B5/1874</class-ref>, <class-ref scheme="cpc">G11B5/1875</class-ref>, <class-ref scheme="cpc">G11B5/33</class-ref>, <class-ref scheme="cpc">G11B5/49</class-ref> take precedence; magnetic thin film structures <class-ref scheme="cpc">H01F10/00</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="G11B5/3103" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structure or manufacture of integrated heads or heads mechanically assembled and electrically connected to a support or housing</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="G11B5/3106" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the integrated or assembled structure comprises means for conditioning against physical detrimental influence, e.g. wear, contamination </text><reference><text><class-ref scheme="cpc">G11B5/3133</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/3109" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3109</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details </text><reference><text><class-ref scheme="cpc">G11B5/3103</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="G11B5/3113" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3113</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for improving the magnetic domain structure or avoiding the formation or displacement of undesirable magnetic domains</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="G11B5/3116" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3116</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks </text><reference><text><class-ref scheme="cpc">G11B5/3113</class-ref>, <class-ref scheme="cpc">G11B5/245</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/312" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/312</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for reducing flux leakage between the electrical coil layers and the magnetic cores or poles or between the magnetic cores or poles</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="G11B5/3123" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using special coil configurations or conductors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/3126" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using superconductors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/313" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/313</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disposition of layers</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="G11B5/3133" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3133</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure </text><reference><text><class-ref scheme="cpc">G11B5/3106</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/3136" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3136</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for reducing the pole-tip-protrusion at the head transducing surface, e.g. caused by thermal expansion of dissimilar materials</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/314" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/314</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the layers are extra layers normally not provided in the transducing structure, e.g. optical layers </text><reference><text><class-ref scheme="cpc">G11B5/3196</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/3143" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding </text><reference><text><class-ref scheme="cpc">G11B5/3116</class-ref>, <class-ref scheme="cpc">G11B5/312</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/3146" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>magnetic layers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/315" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/315</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shield layers on both sides of the main pole, e.g. in perpendicular magnetic heads</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/3153" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3153</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including at least one magnetic thin film coupled by interfacing to the basic magnetic thin film structure</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/3156" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3156</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>providing interaction by induced or exchange coupling</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="13" additional-only="false" sort-key="G11B5/3159" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G11B5/3159</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>superconductive layers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/3163" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3163</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/3166" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3166</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Testing or indicating in relation thereto, e.g. before the fabrication is completed</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="G11B5/3169" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3169</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Working or finishing the interfacing surface of heads, e.g. lapping of heads</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="G11B5/3173" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3173</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Batch fabrication, i.e. producing a plurality of head structures in one batch</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="G11B5/3176" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3176</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structure of heads comprising at least in the transducing gap regions two magnetic thin films disposed respectively at both sides of the gaps </text><reference><text><class-ref scheme="cpc">G11B5/2455</class-ref>, <class-ref scheme="cpc">G11B5/265</class-ref> take precedence; composite magnetic head structures, e.g. "Metal-In-Gap" heads are classified in <class-ref scheme="cpc">G11B5/127</class-ref> or <class-ref scheme="cpc">G11B5/187</class-ref> and subgroups</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="G11B5/3179" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3179</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the films being mainly disposed in parallel planes</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="G11B5/3183" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>intersecting the gap plane, e.g. "horizontal head structure"</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/3186" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>parallel to the gap plane, e.g. "vertical head structure"</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="G11B5/3189" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3189</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Testing</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="G11B5/3193" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3193</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of films or layers, e.g. continuity test</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="G11B5/3196" definition-exists="false" ipc-concordant="G11B5/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3196</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of thin magnetic films, e.g. functional testing of the transducing properties </text><reference><text><class-ref scheme="cpc">G11B5/455</class-ref> takes precedence</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="9" additional-only="false" sort-key="G11B5/325" definition-exists="false" ipc-concordant="G11B5/325" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B5/325</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Erasing heads using permanent magnets </text><reference><text>general details therefor <class-ref scheme="cpc">G11B5/133</class-ref> - <class-ref scheme="cpc">G11B5/255</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="G11B5/33" definition-exists="false" ipc-concordant="G11B5/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B5/33</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Structure or manufacture of flux-sensitive heads, </text><CPC-specific-text><text>i.e. for reproduction only; Combination of such heads with means for recording or erasing only</text></CPC-specific-text><reference><CPC-specific-text><text>Single head using magnetic domains for scanning <class-ref scheme="cpc">G11B5/4946</class-ref>; multiple head for scanning <class-ref scheme="cpc">G11B5/4907</class-ref> and subgroups </text></CPC-specific-text><text> ; general details therefor <class-ref scheme="cpc">G11B5/133</class-ref> - <class-ref scheme="cpc">G11B5/255</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="G11B5/332" definition-exists="false" ipc-concordant="G11B5/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/332</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using thin films </text><reference><text><class-ref scheme="cpc">G11B5/372</class-ref>, <class-ref scheme="cpc">G11B5/3903</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/335" definition-exists="false" ipc-concordant="G11B5/335" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/335</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with saturated jig, e.g. for detecting second harmonic</text></title-part><title-part><text>balanced flux head</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="G11B5/35" definition-exists="false" ipc-concordant="G11B5/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/35</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having vibrating elements</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="G11B5/37" definition-exists="false" ipc-concordant="G11B5/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/37</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using galvano-magnetic devices, e.g. Hall-effect devices </text><reference><text><class-ref scheme="cpc">G11B5/39</class-ref> takes precedence</text></reference><CPC-specific-text><text>using Hall or Hall-related effect, e.g. planar-Hall effect or pseudo-Hall effect</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/372" definition-exists="false" ipc-concordant="G11B5/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/372</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in magnetic thin films</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="G11B5/374" definition-exists="false" ipc-concordant="G11B5/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/374</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integrated structures</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/376" definition-exists="false" ipc-concordant="G11B5/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/376</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in semi-conductors </text><reference><text><class-ref scheme="cpc">G11B5/372</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/378" definition-exists="false" ipc-concordant="G11B5/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/378</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integrated structures</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="G11B5/39" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/39</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using magneto-resistive devices </text><CPC-specific-text><text>or effects</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/3903" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3903</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetic thin film layers or their effects, the films being part of integrated structures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/3906" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3906</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details related to the use of magnetic thin film layers or to their effects</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/3909" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3909</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements using a magnetic tunnel junction</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/3912" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3912</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements in which the active read-out elements are transducing in association with active magnetic shields, e.g. magnetically coupled shields </text><reference><text><class-ref scheme="cpc">G11B5/3916</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="13" additional-only="false" sort-key="G11B5/3916" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3916</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/3919" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3919</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the guide being interposed in the flux path</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/3922" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3922</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="G11B5/3925" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3925</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the two parts being thin films</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="13" additional-only="false" sort-key="G11B5/3929" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3929</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disposition of magnetic thin films not used for directly coupling magnetic flux from the track to the MR film or for shielding</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/3932" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3932</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Magnetic biasing films</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/3935" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3935</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flux closure films not being part of the track flux guides</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/3938" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3938</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the flux closure films being used for absorbing or reducing demagnetisating or saturating fields</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/3941" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3941</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the flux closure films being used for providing a closed magnetic circuit to the MR film</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="13" additional-only="false" sort-key="G11B5/3945" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3945</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heads comprising more than one sensitive element</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/3948" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3948</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the sensitive elements being active read-out elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/3951" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3951</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the active elements being arranged on several parallel planes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="G11B5/3954" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3954</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the active elements transducing on a single track</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/3958" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3958</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the active elements being arranged in a single plane, e.g. "matrix" disposition</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="G11B5/3961" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3961</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>disposed at an angle to the direction of the track or relative movement</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="17" additional-only="false" sort-key="G11B5/3964" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3964</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for transducing on a single track</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/3967" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3967</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Composite structural arrangements of transducers, e.g. inductive write and magnetoresistive read </text><reference><text><class-ref scheme="cpc">G11B5/3906</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/397" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/397</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a plurality of independent magnetoresistive active read-out elements for respectively transducing from selected components</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/3974" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3974</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>from the same information track, e.g. frequency bands</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/3977" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3977</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>from different information tracks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/398" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/398</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Specially shaped layers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/3983" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3983</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with current confined paths in the spacer layer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/3987" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3987</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for closing the magnetic flux during operation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/399" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/399</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with intrinsic biasing, e.g. provided by equipotential strips</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/3993" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/3993</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in semi-conductors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B5/3996" definition-exists="false" ipc-concordant="G11B5/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2005/3996</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>large or giant magnetoresistive effects [GMR], e.g. as generated in spin-valve [SV] devices</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="G11B5/40" definition-exists="true" ipc-concordant="G11B5/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Protective measures on heads, e.g. against excessive temperature </text><reference><text><class-ref scheme="cpc">G11B5/31</class-ref> takes precedence; protection against wear <class-ref scheme="cpc">G11B5/255</class-ref> </text><CPC-specific-text><text>protective structure of the head: <u>see</u> under structures, e.g. <class-ref scheme="cpc">G11B5/3106</class-ref></text></CPC-specific-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="G11B5/41" definition-exists="true" ipc-concordant="G11B5/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/41</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cleaning of heads </text><CPC-specific-text><reference><text>of record carriers <class-ref scheme="cpc">G11B23/50</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="G11B5/455" definition-exists="true" ipc-concordant="G11B5/455" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B5/455</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Arrangements for functional testing of heads</text></title-part><title-part><text>Measuring arrangements for heads</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/4555" definition-exists="false" ipc-concordant="G11B5/455" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4555</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using a spin-stand, i.e. a spinning disc or simulator</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="G11B5/465" definition-exists="true" ipc-concordant="G11B5/465" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B5/465</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Arrangements for demagnetisation of heads</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="G11B5/48" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-11-01" status="published"><classification-symbol>G11B5/48</classification-symbol><class-title date-revised="2015-11-01"><title-part><text>Disposition or mounting of heads </text><CPC-specific-text><text>or head supports</text></CPC-specific-text><text> relative to record carriers </text><CPC-specific-text><reference><text>mounting of head within housing <class-ref scheme="cpc">G11B5/105</class-ref></text></reference><text>; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed </text><reference><text>driving of both record carriers and head <class-ref scheme="cpc">G11B15/18</class-ref>; guiding record carriers <class-ref scheme="cpc">G11B15/60</class-ref>; head selecting circuits <class-ref scheme="cpc">G11B15/12</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/4806" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B5/4806</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives </text><reference><text><class-ref scheme="cpc">G11B5/488</class-ref> - <class-ref scheme="cpc">G11B5/54</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/4813" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4813</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting or aligning of arm assemblies, e.g. actuator arm supported by bearings, multiple arm assemblies, arm stacks or multiple heads on single arm </text><reference><text><class-ref scheme="cpc">G11B5/484</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/4826" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive </text><reference><text><class-ref scheme="cpc">G11B5/484</class-ref> takes precedence; details of head housings or structures <class-ref scheme="cpc">G11B5/10</class-ref>, <class-ref scheme="cpc">G11B5/127</class-ref>; adjustment relative to the record carrier <class-ref scheme="cpc">G11B5/56</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="G11B5/483" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-09-01" status="published"><classification-symbol>G11B5/483</classification-symbol><class-title><title-part><CPC-specific-text><text>Piezo-electric devices between head and arm, e.g. for fine adjustment</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="G11B5/4833" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4833</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head </text><reference><text><class-ref scheme="cpc">G11B5/484</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/484" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/484</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integrated arm assemblies, e.g. formed by material deposition or by etching from single piece of metal or by lamination of materials forming a single arm/suspension/head unit</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/4846" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4846</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional details of the electrical connection between arm and support</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="G11B5/4853" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4853</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional details of the electrical connection between head and arm</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="G11B5/486" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/486</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for mounting or arranging electrical conducting means or circuits on or along the arm assembly</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="G11B5/4866" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B5/4866</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>the arm comprising an optical waveguide, e.g. for thermally-assisted recording</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="G11B5/4873" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4873</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the arm comprising piezoelectric or other actuators for adjustment of the arm</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="G11B5/488" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/488</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disposition of heads </text><reference><text><class-ref scheme="cpc">G11B5/49</class-ref>, <class-ref scheme="cpc">G11B5/52</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/4886" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4886</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>relative to rotating disc</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="G11B5/4893" definition-exists="false" ipc-concordant="G11B5/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4893</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>relative to moving tape</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="G11B5/49" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/49</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fixed mounting </text><CPC-specific-text><text>or arrangements, e.g. one head per track</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="G11B5/4907" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4907</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details for scanning </text><reference><text><class-ref scheme="cpc">G11B5/4969</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="G11B5/4915" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4915</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structure of specially adapted heads </text><reference><text><class-ref scheme="cpc">G11B5/3906</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/4923" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4923</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which zones of the transducing part are being physically controllable</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/493" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/493</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of magnetic properties, e.g. saturation, anisotropy</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/4938" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4938</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of thin magnetic films</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/4946" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4946</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for formation or displacement of magnetic domains, e.g. walls, bubbles</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/4953" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4953</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>part of the structure being mechanically or magnetically coupled to or decoupled from, the transducing part</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="G11B5/4961" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4961</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits</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="G11B5/4969" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4969</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details for track selection or addressing</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="G11B5/4976" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4976</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disposition of heads, e.g. matrix arrangement</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="G11B5/4984" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4984</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structure of specially adapted switching heads </text><reference><text><class-ref scheme="cpc">G11B5/3958</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/4992" definition-exists="false" ipc-concordant="G11B5/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/4992</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/50" definition-exists="false" ipc-concordant="G11B5/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Interchangeable mountings, e.g. for replacement of head without readjustment</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="G11B5/52" definition-exists="false" ipc-concordant="G11B5/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with simultaneous movement of head and record carrier, e.g. rotation of head </text><reference><text><class-ref scheme="cpc">G11B5/588</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="G11B5/53" definition-exists="false" ipc-concordant="G11B5/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/53</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Disposition or mounting of heads on rotating support</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/531" definition-exists="false" ipc-concordant="G11B5/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/531</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disposition of more than one recording or reproducing head on support rotating cyclically around an axis</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="G11B5/532" definition-exists="false" ipc-concordant="G11B5/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/532</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Parallel to the direction of movement of the tape, e.g. for transversal scanning</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/534" definition-exists="false" ipc-concordant="G11B5/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/534</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>inclined relative to the direction of movement of the tape, e.g. for helicoidal scanning</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/535" definition-exists="false" ipc-concordant="G11B5/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/535</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>perpendicular to the direction of movement of the tape, e.g. for longitudinal scanning</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/537" definition-exists="false" ipc-concordant="G11B5/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/537</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with all the heads disposed in a plane substantially parallel to the plane of the tape, e.g. for circular scanning</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/538" definition-exists="false" ipc-concordant="G11B5/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/538</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disposition or mounting of pole pieces on rotating support </text><reference><text>magnetic switching of fixed head arrangements <class-ref scheme="cpc">G11B5/49</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/54" definition-exists="false" ipc-concordant="G11B5/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B5/54</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>with provision for moving the head into or out of its operative position or across tracks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/55" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/55</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Track change, selection or acquisition by displacement of the head</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/5504" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5504</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>across tape tracks</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="G11B5/5508" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5508</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control circuits therefor </text><reference><text><class-ref scheme="cpc">G11B5/5513</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="11" additional-only="false" sort-key="G11B5/5513" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5513</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Specially adapted for transducing in both travelling directions of tape</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="G11B5/5517" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5517</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlled by automatic tape drive reversing arrangement </text><reference><text>reversing tape drive arrangements <class-ref scheme="cpc">G11B15/444</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/5521" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-02-01" status="published"><classification-symbol>G11B5/5521</classification-symbol><class-title date-revised="2017-02-01"><title-part><CPC-specific-text><text>across disk tracks </text><reference><text>spiral track following <class-ref scheme="cpc">G11B5/596</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> For groups <class-ref scheme="cpc">G11B5/5526</class-ref> - <class-ref scheme="cpc">G11B5/5582</class-ref>, <u>see</u> provisionally <class-ref scheme="cpc">G11B5/5521</class-ref> and <class-ref scheme="cpc">G11B5/596</class-ref></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/5526" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5526</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof </text><reference><text><class-ref scheme="cpc">G11B5/556</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/553" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/553</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="14" additional-only="false" sort-key="G11B5/5534" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5534</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Initialisation, calibration, e.g. cylinder "set-up"</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/5539" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B5/5539</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Skew adjustment, e.g. adjustment of the position of the first sector in each track with respect to the other tracks, for improving, e.g. access performance</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/5543" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5543</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>servo-format therefor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/5547" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5547</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>"Seek" control and circuits therefor </text><reference><text><class-ref scheme="cpc">G11B5/5556</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/5552" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5552</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/5556" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5556</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with track following after a "seek"</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/556" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/556</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>control circuits therefor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/5565" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5565</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>system adaptation for compensation of variations of physical parameters, e.g. temperature</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/5569" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5569</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>details of specially adapted mobile parts, e.g. electromechanical control devices </text><reference><text>motors in general <class-ref scheme="cpc">H02K</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/5573" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B5/5573</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Details of the magnetic circuit, e.g. of actuators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/5578" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B5/5578</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Multiple actuators addressing the same disk, e.g. to improve data rate or access rate</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/5582" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5582</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>system adaptation for working during or after external perturbation, e.g. in the presence of a mechanical oscillation caused by a shock</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/5586" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B5/5586</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Minimising seek noise, e.g. actuator noise</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="G11B5/5591" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5591</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>across drum tracks</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="G11B5/5595" definition-exists="false" ipc-concordant="G11B5/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5595</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control circuits therefor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/56" definition-exists="false" ipc-concordant="G11B5/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B5/56</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>with provision for moving the head </text><CPC-specific-text><text>support</text></CPC-specific-text><text> for the purpose of adjusting the position of the head relative to the record carrier, e.g. manual adjustment for azimuth correction or track centering </text><reference><CPC-specific-text><text><class-ref scheme="cpc">G11B5/52</class-ref>,</text></CPC-specific-text><text> <class-ref scheme="cpc">G11B5/54</class-ref>, <class-ref scheme="cpc">G11B5/58</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="G11B5/58" definition-exists="false" ipc-concordant="G11B5/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following </text><CPC-specific-text><reference><text>spacing means incorporated in the head structure <class-ref scheme="cpc">G11B5/187</class-ref>, <class-ref scheme="cpc">G11B5/255</class-ref>, <class-ref scheme="cpc">G11B5/3106</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="G11B5/581" definition-exists="false" ipc-concordant="G11B5/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/581</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>maintaining desired contact or spacing by direct interaction of forces generated between heads or supports thereof and record carriers or supports thereof, e.g. attraction-repulsion interactions</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="G11B5/582" definition-exists="false" ipc-concordant="G11B5/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/582</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>interactions in a magnetic field</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="G11B5/583" definition-exists="false" ipc-concordant="G11B5/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/583</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using repulsion generated by superconductors in a magnetic field, e.g. by "Meissner effect"</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="G11B5/584" definition-exists="false" ipc-concordant="G11B5/584" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/584</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for track following on tapes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/588" definition-exists="false" ipc-concordant="G11B5/588" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/588</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by controlling the position of the rotating heads </text><reference><text>by controlling the speed of the record carrier <class-ref scheme="cpc">G11B15/467</class-ref>; by controlling speed of the heads <class-ref scheme="cpc">G11B15/473</class-ref>; </text><CPC-specific-text><text>by moving the transducing part of the head relative to the headwheel, in the direction of the scanning movement <class-ref scheme="cpc">G11B15/1841</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/592" definition-exists="false" ipc-concordant="G11B5/592" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/592</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using bimorph elements supporting the heads </text><CPC-specific-text><reference><text><u>see</u> provisional also <class-ref scheme="cpc">G11B5/588</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/5921" definition-exists="false" ipc-concordant="G11B5/592" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5921</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using auxiliary signals, e.g. pilot signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/5922" definition-exists="false" ipc-concordant="G11B5/592" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5922</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>superimposed on the main signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/5923" definition-exists="false" ipc-concordant="G11B5/592" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5923</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>recorded in horizontal suppression internal of video frame</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/5925" definition-exists="false" ipc-concordant="G11B5/592" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5925</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>recorded in vertical suppression internal of video frame</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/5926" definition-exists="false" ipc-concordant="G11B5/592" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5926</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>recorded in separate tracks, e.g. servo tracks</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/5927" definition-exists="false" ipc-concordant="G11B5/592" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5927</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Helicoidal tracks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/5928" definition-exists="false" ipc-concordant="G11B5/592" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5928</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Longitudinal tracks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/596" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B5/596</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for track following on disks </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B5/5526</class-ref>, <class-ref scheme="cpc">G11B5/5552</class-ref>, <class-ref scheme="cpc">G11B5/5565</class-ref>, <class-ref scheme="cpc">G11B5/5582</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> For groups <class-ref scheme="cpc">G11B5/59605</class-ref> - <class-ref scheme="cpc">G11B5/59633</class-ref>, <u>see</u> provisionally <class-ref scheme="cpc">G11B5/5521</class-ref> and <class-ref scheme="cpc">G11B5/596</class-ref></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/59605" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B5/59605</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Circuits </text><reference><text><class-ref scheme="cpc">G11B5/59627</class-ref> - <class-ref scheme="cpc">G11B5/59688</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/59611" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59611</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detection or processing of peak/envelop signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/59616" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59616</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation; Clocking </text><reference><text><class-ref scheme="cpc">G11B5/59622</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/59622" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59622</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gain control; Filters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/59627" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59627</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Aligning for runout, eccentricity or offset compensation </text><reference><text><class-ref scheme="cpc">G11B5/5534</class-ref>, <class-ref scheme="cpc">G11B5/59677</class-ref>, <class-ref scheme="cpc">G11B5/59688</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/59633" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59633</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Servo formatting </text><reference><text><class-ref scheme="cpc">G11B5/59627</class-ref>, <class-ref scheme="cpc">G11B5/59677</class-ref>, <class-ref scheme="cpc">G11B5/59683</class-ref>, <class-ref scheme="cpc">G11B5/59688</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/59638" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59638</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Servo formatting apparatuses, e.g. servo-writers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/59644" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59644</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Acquisition or selection of servo format from a system reference </text><reference><text>after track seek <class-ref scheme="cpc">G11B5/5556</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/5965" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/5965</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Embedded servo format </text><reference><text><class-ref scheme="cpc">G11B5/59655</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/59655" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59655</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sector, sample or burst servo format</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/59661" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59661</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spiral servo format</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/59666" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59666</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Self servo writing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/59672" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59672</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Servo re-writing, e.g. for the correction of offsets or 'fading' of servo marks</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="G11B5/59677" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59677</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with optical servo tracking</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="G11B5/59683" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59683</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for magnetoresistive heads</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="G11B5/59688" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59688</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Servo signal format patterns or signal processing thereof, e.g. dual, tri, quad, burst signal patterns</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="G11B5/59694" definition-exists="false" ipc-concordant="G11B5/596" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/59694</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>System adaptation for working during or after external perturbation, e.g. in the presence of a mechanical oscillation caused by a shock</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="G11B5/60" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B5/60</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Fluid-dynamic spacing of heads from record-carriers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/6005" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Specially adapted for spacing from a rotating disc using a fluid cushion</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="G11B5/6011" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6011</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of flying height</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/6017" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6017</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using capacitive measurement</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/6023" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using inductive measurement</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/6029" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Measurement using values derived from the data signal read from the disk</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/6035" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electrostatic forces</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/6041" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetic forces</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/6047" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetostrictive means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/6052" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using optical means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/6058" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using piezoelectric means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/6064" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using air pressure</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/607" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/607</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using thermal means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/6076" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detecting head-disk contact</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/6082" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Design of the air bearing surface</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/6088" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical waveguide in or on flying head</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/6094" definition-exists="false" ipc-concordant="G11B5/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/6094</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Preventing or discharging electrostatic charge build-up on the flying head</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B5/62" definition-exists="true" ipc-concordant="G11B5/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/62</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>Record carriers characterised by the selection of the material</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This group <u>does not cover</u> compositions, materials or processes, <u>per se</u>, which are covered by the relevant subclasses of section <class-ref scheme="cpc">B</class-ref> or <class-ref scheme="cpc">C</class-ref>.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/627" definition-exists="false" ipc-concordant="G11B5/627" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B5/627</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>of leaders for magnetic tapes, e.g. non-magnetic strips on the tapes or for connection</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="G11B5/633" definition-exists="false" ipc-concordant="G11B5/633" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/633</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of cinematographic films or slides with integral magnetic track</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="G11B5/64" definition-exists="true" ipc-concordant="G11B5/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/64</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>comprising only the magnetic material without bonding agent</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G11B5/64</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G11B5/657</class-ref> - <class-ref scheme="cpc">G11B5/658</class-ref> and <class-ref scheme="cpc">G11B5/672</class-ref> - <class-ref scheme="cpc">G11B5/678</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/642" definition-exists="false" ipc-concordant="G11B5/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/642</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>self supporting magnetic material, e.g. magnetisable wires</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="G11B5/65" definition-exists="true" ipc-concordant="G11B5/65" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/65</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>characterised by its composition </text><reference><text><class-ref scheme="cpc">G11B5/66</class-ref> takes precedence</text></reference></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G11B5/65</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G11B5/657</class-ref> - <class-ref scheme="cpc">G11B5/658</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/653" definition-exists="true" ipc-concordant="G11B5/65" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/653</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>containing Fe or Ni </text><reference><text>containing Co <class-ref scheme="cpc">G11B5/656</class-ref>; containing inorganic, non-oxide compounds of Si, N, P, B, H or C <class-ref scheme="cpc">G11B5/657</class-ref>; containing oxygen <class-ref scheme="cpc">G11B5/658</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G11B5/653</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G11B5/657</class-ref> - <class-ref scheme="cpc">G11B5/658</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/656" definition-exists="true" ipc-concordant="G11B5/65" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/656</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>containing Co </text><reference><text>containing inorganic, non-oxide compounds of Si, N, P, B, H or C <class-ref scheme="cpc">G11B5/657</class-ref>; containing oxygen <class-ref scheme="cpc">G11B5/658</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G11B5/656</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G11B5/657</class-ref> - <class-ref scheme="cpc">G11B5/658</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/657" definition-exists="true" ipc-concordant="G11B5/65" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/657</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>containing inorganic, non-oxide compound of Si, N, P, B, H or C, e.g. in metal alloy or compound </text><reference><text>containing oxygen <class-ref scheme="cpc">G11B5/658</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G11B5/657</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G11B5/64</class-ref> and <class-ref scheme="cpc">G11B5/65</class-ref> - <class-ref scheme="cpc">G11B5/656</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/658" definition-exists="true" ipc-concordant="G11B5/65" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/658</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>containing oxygen, e.g. molecular oxygen or magnetic oxide</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G11B5/658</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G11B5/64</class-ref> and <class-ref scheme="cpc">G11B5/65</class-ref> - <class-ref scheme="cpc">G11B5/656</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/66" definition-exists="true" ipc-concordant="G11B5/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/66</classification-symbol><class-title date-revised="2021-05-01"><title-part><text>the record carriers consisting of several layers</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G11B5/66</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G11B5/672</class-ref> - <class-ref scheme="cpc">G11B5/678</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/667" definition-exists="true" ipc-concordant="G11B5/667" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/667</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>including a soft magnetic layer</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G11B5/667</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G11B5/672</class-ref> - <class-ref scheme="cpc">G11B5/678</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/672" definition-exists="true" ipc-concordant="G11B5/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/672</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>having different compositions in a plurality of magnetic layers, e.g. layer compositions having differing elemental components or differing proportions of elements</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G11B5/672</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G11B5/64</class-ref> and <class-ref scheme="cpc">G11B5/66</class-ref> - <class-ref scheme="cpc">G11B5/667</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/674" definition-exists="true" ipc-concordant="G11B5/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/674</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>having differing macroscopic or microscopic structures, e.g. differing crystalline lattices, varying atomic structures or differing roughnesses</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G11B5/674</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G11B5/64</class-ref> and <class-ref scheme="cpc">G11B5/66</class-ref> - <class-ref scheme="cpc">G11B5/667</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/676" definition-exists="true" ipc-concordant="G11B5/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/676</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G11B5/676</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G11B5/64</class-ref> and <class-ref scheme="cpc">G11B5/66</class-ref> - <class-ref scheme="cpc">G11B5/667</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/678" definition-exists="true" ipc-concordant="G11B5/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G11B5/678</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>having three or more magnetic layers</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G11B5/678</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G11B5/64</class-ref> and <class-ref scheme="cpc">G11B5/66</class-ref> - <class-ref scheme="cpc">G11B5/667</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/68" definition-exists="false" ipc-concordant="G11B5/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/70" definition-exists="false" ipc-concordant="G11B5/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>on a base layer</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G11B5/70</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G11B5/7006</class-ref>.<br/>Groups <class-ref scheme="cpc">G11B5/70</class-ref> and <class-ref scheme="cpc">G11B5/7006</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/7006" definition-exists="false" ipc-concordant="G11B5/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="frozen"><classification-symbol>G11B5/7006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a magnetic layer on both sides covered with non-magnetic material</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G11B5/7006</class-ref> is no longer used for the classification of documents as of <reclassification-date>2020-08-01</reclassification-date>. <br/>The content of this group is being reclassified into groups <class-ref scheme="cpc">G11B5/70</class-ref>, <class-ref scheme="cpc">G11B5/718</class-ref> and <class-ref scheme="cpc">G11B5/728</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/7013" definition-exists="false" ipc-concordant="G11B5/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/7013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the dispersing agent</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="G11B5/702" definition-exists="false" ipc-concordant="G11B5/702" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/702</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the bonding agent</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/7021" definition-exists="false" ipc-concordant="G11B5/702" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/7021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing a polyurethane or a polyisocyanate</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/7022" definition-exists="false" ipc-concordant="G11B5/702" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/7022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing mixtures of polyurethanes or polyisocyanates with other polymers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/7023" definition-exists="false" ipc-concordant="G11B5/702" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/7023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing polyesters, polyethers, silicones, polyvinyl resins, polyacrylresins or epoxy resins </text><reference><text><class-ref scheme="cpc">G11B5/7022</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/7025" definition-exists="false" ipc-concordant="G11B5/702" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/7025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing cellulosic derivates </text><reference><text><class-ref scheme="cpc">G11B5/7022</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/7026" definition-exists="false" ipc-concordant="G11B5/702" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/7026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Radiation curable polymers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/7027" definition-exists="false" ipc-concordant="G11B5/702" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/7027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Graft polymers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/7028" definition-exists="false" ipc-concordant="G11B5/702" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/7028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Additives, e.g. crosslinking agents</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="G11B5/706" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/706</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the composition of the magnetic material</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/70605" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>metals or alloys</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/7061" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/7061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a non-magnetic core</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/70615" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70615</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing Fe metal or alloys </text><reference><text><class-ref scheme="cpc">G11B5/70621</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="13" additional-only="false" sort-key="G11B5/70621" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70621</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing Co metal or alloys</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/70626" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70626</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing non-metallic substances</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/70631" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70631</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a non-magnetic core</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/70636" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70636</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>CrO<sub>2</sub></text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/70642" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70642</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>iron oxides</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/70647" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70647</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a skin </text><reference><text><class-ref scheme="cpc">G11B5/70657</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="14" additional-only="false" sort-key="G11B5/70652" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70652</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>gamma - Fe<sub>2</sub> O<sub>3</sub></text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/70657" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70657</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a skin</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/70663" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70663</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Preparation processes specially adapted therefor, e.g. using stabilising agents </text><reference><text><class-ref scheme="cpc">G11B5/70668</class-ref> and <class-ref scheme="cpc">G11B5/70673</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/70668" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70668</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing a dopant</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="G11B5/70673" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70673</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing Co</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B5/70678" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70678</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ferrites</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B5/70684" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70684</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ferro-ferrioxydes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="G11B5/70689" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70689</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Magnetite</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="G11B5/70694" definition-exists="false" ipc-concordant="G11B5/706" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/70694</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Non-stoechiometric ferro-ferrioxydes, e.g. berthollide</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/708" definition-exists="false" ipc-concordant="G11B5/708" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/708</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by addition of non-magnetic particles to the layer</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/7085" definition-exists="false" ipc-concordant="G11B5/708" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/7085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>non-magnetic abrasive particles</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="G11B5/71" definition-exists="false" ipc-concordant="G11B5/71" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/71</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the lubricant</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="G11B5/712" definition-exists="false" ipc-concordant="G11B5/712" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/712</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the surface treatment or coating of magnetic particles</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="G11B5/714" definition-exists="false" ipc-concordant="G11B5/714" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/714</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the dimension of the magnetic particles</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="G11B5/716" definition-exists="false" ipc-concordant="G11B5/716" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/716</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by two or more magnetic layers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/718" definition-exists="false" ipc-concordant="G11B5/718" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/718</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>at least one on each side of the base layer</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G11B5/718</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G11B5/7006</class-ref>.<br/>Groups <class-ref scheme="cpc">G11B5/7006</class-ref> and <class-ref scheme="cpc">G11B5/718</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/72" definition-exists="true" ipc-concordant="G11B5/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/72</classification-symbol><class-title date-revised="2020-08-01"><title-part><text>Protective coatings, e.g. anti-static </text><CPC-specific-text><text>or antifriction</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G11B5/72</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G11B5/7253</class-ref> - <class-ref scheme="cpc">G11B5/728</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/722" definition-exists="true" ipc-concordant="G11B5/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/722</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing an anticorrosive material</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G11B5/722</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G11B5/7253</class-ref> - <class-ref scheme="cpc">G11B5/728</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/725" definition-exists="true" ipc-concordant="G11B5/725" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/725</classification-symbol><class-title date-revised="2020-08-01"><title-part><text>containing a lubricant </text><CPC-specific-text><text>, e.g. organic compounds </text><reference><text>inorganic carbon protective coating <class-ref scheme="cpc">G11B5/727</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G11B5/725</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G11B5/7253</class-ref> - <class-ref scheme="cpc">G11B5/728</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/7253" definition-exists="true" ipc-concordant="G11B5/725" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/7253</classification-symbol><class-title date-revised="2020-08-01"><title-part><CPC-specific-text><text>Fluorocarbon lubricant</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">G11B5/7253</class-ref> - <class-ref scheme="cpc">G11B5/7257</class-ref> are incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G11B5/72</class-ref> -<class-ref scheme="cpc">G11B5/725</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/7257" definition-exists="true" ipc-concordant="G11B5/725" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/7257</classification-symbol><class-title date-revised="2020-08-01"><title-part><CPC-specific-text><text>Perfluoropolyether lubricant</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="G11B5/726" definition-exists="true" ipc-concordant="G11B5/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/726</classification-symbol><class-title date-revised="2020-08-01"><title-part><CPC-specific-text><text>Two or more protective coatings </text><reference><text>inorganic carbon protective coating <class-ref scheme="cpc">G11B5/727</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Groups <class-ref scheme="cpc">G11B5/726</class-ref> - <class-ref scheme="cpc">G11B5/7268</class-ref> are incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G11B5/72</class-ref> - <class-ref scheme="cpc">G11B5/725</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/7262" definition-exists="true" ipc-concordant="G11B5/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/7262</classification-symbol><class-title date-revised="2020-08-01"><title-part><CPC-specific-text><text>Inorganic protective coating</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="G11B5/7264" definition-exists="true" ipc-concordant="G11B5/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/7264</classification-symbol><class-title date-revised="2020-08-01"><title-part><CPC-specific-text><text>Inorganic carbon protective coating, e.g. graphite, diamond like carbon or doped carbon</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/7266" definition-exists="true" ipc-concordant="G11B5/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/7266</classification-symbol><class-title date-revised="2020-08-01"><title-part><CPC-specific-text><text>comprising a lubricant over the inorganic carbon coating</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/7268" definition-exists="true" ipc-concordant="G11B5/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/7268</classification-symbol><class-title date-revised="2020-08-01"><title-part><CPC-specific-text><text>comprising elemental nitrogen in the inorganic carbon coating</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/727" definition-exists="true" ipc-concordant="G11B5/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/727</classification-symbol><class-title date-revised="2020-08-01"><title-part><CPC-specific-text><text>Inorganic carbon protective coating, e.g. graphite, diamond like carbon or doped carbon</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G11B5/727</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G11B5/72</class-ref> - <class-ref scheme="cpc">G11B5/725</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/728" definition-exists="true" ipc-concordant="G11B5/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G11B5/728</classification-symbol><class-title date-revised="2020-08-01"><title-part><CPC-specific-text><text>containing a bonding agent in the protective coating</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G11B5/728</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G11B5/7006</class-ref> and <class-ref scheme="cpc">G11B5/72</class-ref> - <class-ref scheme="cpc">G11B5/725</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/73" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G11B5/73</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Base layers </text><CPC-specific-text><text>, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer</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="G11B5/733" definition-exists="true" ipc-concordant="G11B5/733" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G11B5/733</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>characterised by the addition of non-magnetic particles </text><CPC-specific-text><reference><text>base layers having a non-magnetic layer under a soft magnetic layer <class-ref scheme="cpc">G11B5/736</class-ref>; magnetic recording media substrates <class-ref scheme="cpc">G11B5/739</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="note"><note-paragraph> <CPC-specific-note>This subgroup <u>covers</u>: non-magnetic base layer structures characterised by the addition of non-magnetic particles.</CPC-specific-note></note-paragraph><note-paragraph><CPC-specific-note>This subgroup <u>does not cover</u>: magnetic layer structures comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent (even when also containing non-magnetic particles), which are covered by <class-ref scheme="cpc">G11B5/68</class-ref> (in particular, <class-ref scheme="cpc">G11B5/708</class-ref> and <class-ref scheme="cpc">G11B5/7085</class-ref>).</CPC-specific-note></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/7334" definition-exists="true" ipc-concordant="G11B5/733" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G11B5/7334</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Base layer characterised by composition or structure</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/735" definition-exists="true" ipc-concordant="G11B5/735" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G11B5/735</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>characterised by the back layer </text><CPC-specific-text><reference><text>magnetic recording media substrates <class-ref scheme="cpc">G11B5/739</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="G11B5/7353" definition-exists="true" ipc-concordant="G11B5/735" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G11B5/7353</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>for a thin film medium where the magnetic recording layer structure has no bonding agent</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="G11B5/7356" definition-exists="true" ipc-concordant="G11B5/735" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G11B5/7356</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>comprising non-magnetic particles in the back layer, e.g. particles of TiO<sub>2</sub>, ZnO or SiO<sub>2</sub></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="G11B5/7358" definition-exists="true" ipc-concordant="G11B5/735" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7358</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>specially adapted for achieving a specific property, e.g. average roughness [Ra]</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="G11B5/736" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G11B5/736</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Non-magnetic layer under a soft magnetic layer, e.g. between a substrate and a soft magnetic underlayer [SUL] or a keeper layer </text><reference><text>magnetic recording media substrates <class-ref scheme="cpc">G11B5/739</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="G11B5/7361" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7361</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Two or more non-magnetic layers</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="G11B5/7362" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7362</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Physical structure of underlayer, e.g. texture</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="G11B5/7363" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7363</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Non-magnetic single underlayer comprising nickel</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="G11B5/7364" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7364</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Non-magnetic single underlayer comprising chromium</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="G11B5/7365" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7365</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Non-magnetic single underlayer comprising a polymeric structure, e.g. polymeric adhesion layer or plasma-polymerized carbon layer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/7366" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7366</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>for heat-assisted or thermally-assisted magnetic recording [HAMR, TAMR]</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="G11B5/7367" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7367</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Physical structure of underlayer, e.g. texture</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="G11B5/7368" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G11B5/7368</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Non-polymeric layer under the lowermost magnetic recording layer </text><reference><text>base layers having a non-magnetic layer under a soft magnetic layer <class-ref scheme="cpc">G11B5/736</class-ref>; magnetic recording media substrates <class-ref scheme="cpc">G11B5/739</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="G11B5/7369" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7369</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Two or more non-magnetic underlayers, e.g. seed layers or barrier layers</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="G11B5/737" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/737</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Physical structure of underlayer, e.g. texture</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="G11B5/7371" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7371</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Non-magnetic single underlayer comprising nickel</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="G11B5/7373" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7373</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Non-magnetic single underlayer comprising chromium</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="G11B5/7375" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7375</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>for heat-assisted or thermally-assisted magnetic recording [HAMR, TAMR]</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="G11B5/7377" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7377</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Physical structure of underlayer, e.g. texture</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="G11B5/7379" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/7379</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Seed layer, e.g. at least one non-magnetic layer is specifically adapted as a seed or seeding layer</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="G11B5/739" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G11B5/739</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Magnetic recording media substrates</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/73911" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73911</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Inorganic substrates</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="G11B5/73913" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73913</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Composites or coated substrates</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/73915" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73915</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Silicon compound based coating</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/73917" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73917</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Metallic substrates, i.e. elemental metal or metal alloy substrates</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/73919" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73919</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Aluminium or titanium elemental or alloy substrates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/73921" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73921</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Glass or ceramic substrates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B5/73923" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73923</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Organic polymer substrates</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="G11B5/73925" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73925</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Composite or coated non-esterified substrates</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/73927" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73927</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Polyester substrates, e.g. polyethylene terephthalate</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/73929" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73929</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>comprising naphthalene ring compounds, e.g. polyethylene naphthalate substrates</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/73931" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73931</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Two or more layers, at least one layer being polyester</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/73933" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73933</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Surface treated layers, e.g. treated by corona discharge</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B5/73935" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73935</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>characterised by roughness or surface features, e.g. by added particles</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B5/73937" definition-exists="true" ipc-concordant="G11B5/73" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G11B5/73937</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Substrates having an organic polymer comprising a ring structure</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B5/74" definition-exists="true" ipc-concordant="G11B5/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/743" definition-exists="false" ipc-concordant="G11B5/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/743</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Patterned record carriers, wherein the magnetic recording layer is patterned into magnetic isolated data islands, e.g. discrete tracks</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="G11B5/746" definition-exists="false" ipc-concordant="G11B5/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/746</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bit Patterned record carriers, wherein each magnetic isolated data island corresponds to a bit</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="G11B5/76" definition-exists="false" ipc-concordant="G11B5/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/76</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Drum carriers</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="G11B5/78" definition-exists="false" ipc-concordant="G11B5/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tape carriers</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="G11B5/80" definition-exists="false" ipc-concordant="G11B5/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Card carriers</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="G11B5/82" definition-exists="false" ipc-concordant="G11B5/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-02-01" status="published"><classification-symbol>G11B5/82</classification-symbol><class-title date-revised="2017-02-01"><title-part><text>Disk carriers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/825" definition-exists="false" ipc-concordant="G11B5/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>flexible discs</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B5/84" definition-exists="false" ipc-concordant="G11B5/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B5/84</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Processes or apparatus specially adapted for manufacturing record carriers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/8404" definition-exists="false" ipc-concordant="G11B5/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/8404</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>manufacturing base layers</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="G11B5/8408" definition-exists="false" ipc-concordant="G11B5/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/8408</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>protecting the magnetic layer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/8412" definition-exists="false" ipc-concordant="G11B5/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/8412</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>treatment by ultrasonics</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="G11B5/8416" definition-exists="false" ipc-concordant="G11B5/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/8416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>coating a support with a magnetic layer by precipitation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/842" definition-exists="false" ipc-concordant="G11B5/842" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/842</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coating a support with a liquid magnetic dispersion</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B5/845" definition-exists="false" ipc-concordant="G11B5/845" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/845</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in a magnetic field</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B5/848" definition-exists="false" ipc-concordant="G11B5/848" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/848</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coating a support with a magnetic layer by extrusion</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="G11B5/85" definition-exists="false" ipc-concordant="G11B5/85" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/85</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coating a support with a magnetic layer by vapour deposition</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="G11B5/851" definition-exists="false" ipc-concordant="G11B5/851" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/851</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coating a support with a magnetic layer by sputtering</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="G11B5/852" definition-exists="false" ipc-concordant="G11B5/852" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/852</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Orientation in a magnetic field </text><reference><text><class-ref scheme="cpc">G11B5/845</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="G11B5/855" definition-exists="false" ipc-concordant="G11B5/855" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/855</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coating only part of a support with a magnetic layer</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="G11B5/858" definition-exists="false" ipc-concordant="G11B5/858" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/858</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Producing a magnetic layer by electro-plating or electroless plating</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="G11B5/86" definition-exists="true" ipc-concordant="G11B5/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/86</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers </text><CPC-specific-text><reference><text>by varying the order of the information <class-ref scheme="cpc">G11B27/029</class-ref>, <class-ref scheme="cpc">G11B27/036</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="G11B5/865" definition-exists="false" ipc-concordant="G11B5/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B5/865</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by contact "printing"</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11B7/00" definition-exists="true" ipc-concordant="G11B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B7/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation </text><CPC-specific-text><text>by modifying optical properties or the physical structure</text></CPC-specific-text><text>, reproducing using an optical beam at lower power </text><CPC-specific-text><text>by sensing optical properties</text></CPC-specific-text></title-part><title-part><text>Record carriers therefor </text><reference><text><class-ref scheme="cpc">G11B11/00</class-ref>, <class-ref scheme="cpc">G11B13/00</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11B7/0003" definition-exists="false" ipc-concordant="G11B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/0003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Recording, reproducing or erasing systems characterised by the structure or type of the carrier</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B7/0006" definition-exists="false" ipc-concordant="G11B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/0006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for scanning different types of carrier, e.g. CD & DVD</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B7/0009" definition-exists="false" ipc-concordant="G11B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for carriers having data stored in three dimensions, e.g. volume storage</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="G11B7/0013" definition-exists="false" ipc-concordant="G11B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/0013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for carriers having multiple discrete layers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B7/0016" definition-exists="false" ipc-concordant="G11B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for carriers adapted to have label information written on the non-data side by the optical head used for data recording, e.g. lightscribe, labelflash</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="G11B7/002" definition-exists="false" ipc-concordant="G11B7/002" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recording, reproducing or erasing systems characterised by the shape </text><CPC-specific-text><text>or form</text></CPC-specific-text><text> of the carrier</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B7/0025" definition-exists="true" ipc-concordant="G11B7/0025" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with cylinders or cylinder-like carriers </text><CPC-specific-text><text>or cylindrical sections or flat carriers loaded onto a cylindrical surface</text></CPC-specific-text><text>, e.g. truncated cones</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="G11B7/003" definition-exists="true" ipc-concordant="G11B7/003" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with webs </text><CPC-specific-text><text>, filaments or wires</text></CPC-specific-text><text>, e.g. belts, spooled tapes or films of quasi-infinite extent</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/0031" definition-exists="true" ipc-concordant="G11B7/003" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a rotating head, e.g. helicoidal recording</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="G11B7/0032" definition-exists="true" ipc-concordant="G11B7/003" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for moving-picture soundtracks, i.e. cinema </text><reference><text>cameras or projectors with sound recording or reproducing means <class-ref scheme="cpc">G03B31/02</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B7/0033" definition-exists="true" ipc-concordant="G11B7/0033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with cards </text><CPC-specific-text><text>or other card-like flat carriers, e.g. flat sheets of optical film</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="G11B7/0037" definition-exists="true" ipc-concordant="G11B7/0037" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0037</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with discs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/00375" definition-exists="true" ipc-concordant="G11B7/0037" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00375</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arrangements for detection of physical defects, e.g. of recording layer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B7/004" definition-exists="false" ipc-concordant="G11B7/004" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recording, reproducing or erasing methods</text></title-part><title-part><text>Read, write or erase circuits therefor </text><CPC-specific-text><reference><text>magneto-optical systems <class-ref scheme="cpc">G11B11/105</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="G11B7/0045" definition-exists="true" ipc-concordant="G11B7/0045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B7/0045</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Recording </text><reference><text><class-ref scheme="cpc">G11B7/006</class-ref>, <class-ref scheme="cpc">G11B7/0065</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="G11B7/00451" definition-exists="true" ipc-concordant="G11B7/0045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00451</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving ablation of the recording layer</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="G11B7/00452" definition-exists="true" ipc-concordant="G11B7/0045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00452</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving bubble or bump forming</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="G11B7/00453" definition-exists="true" ipc-concordant="G11B7/0045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00453</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving spectral or photochemical hole burning</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="G11B7/00454" definition-exists="true" ipc-concordant="G11B7/0045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00454</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving phase-change effects</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="G11B7/00455" definition-exists="true" ipc-concordant="G11B7/0045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving reflectivity, absorption or colour changes</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="G11B7/00456" definition-exists="true" ipc-concordant="G11B7/0045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00456</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Recording strategies, e.g. pulse sequences </text><reference><text><class-ref scheme="cpc">G11B7/0062</class-ref> takes precedence</text></reference></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="G11B7/00457" definition-exists="false" ipc-concordant="G11B7/0045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/00457</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Two photon recording</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="G11B7/00458" definition-exists="true" ipc-concordant="G11B7/0045" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11B7/00458</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Verification, i.e. checking data during or after recording</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="G11B7/005" definition-exists="false" ipc-concordant="G11B7/005" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reproducing </text><reference><text><class-ref scheme="cpc">G11B7/0065</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="G11B7/0051" definition-exists="true" ipc-concordant="G11B7/005" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0051</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving phase depth effects</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="G11B7/0052" definition-exists="true" ipc-concordant="G11B7/005" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving reflectivity, absorption or colour changes</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="G11B7/0053" definition-exists="false" ipc-concordant="G11B7/005" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11B7/0053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reproducing non-user data, e.g. wobbled address, prepits, BCA</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="G11B7/0055" definition-exists="true" ipc-concordant="G11B7/0055" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0055</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Erasing </text><reference><text><class-ref scheme="cpc">G11B7/006</class-ref>, <class-ref scheme="cpc">G11B7/0065</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="G11B7/00552" definition-exists="false" ipc-concordant="G11B7/0055" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00552</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving colour change media</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="G11B7/00555" definition-exists="false" ipc-concordant="G11B7/0055" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00555</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving liquid crystal media</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="G11B7/00557" definition-exists="true" ipc-concordant="G11B7/0055" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00557</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving phase-change media</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="G11B7/006" definition-exists="true" ipc-concordant="G11B7/006" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Overwriting </text><reference><text><class-ref scheme="cpc">G11B7/0065</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="G11B7/0062" definition-exists="true" ipc-concordant="G11B7/006" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Overwriting strategies, e.g. recording pulse sequences with erasing level used for phase-change media</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="G11B7/0065" definition-exists="true" ipc-concordant="G11B7/0065" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recording, reproducing or erasing by using optical interference patterns, e.g. holograms</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B7/00653" definition-exists="false" ipc-concordant="G11B7/0065" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/00653</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Collinear holography</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="G11B7/00656" definition-exists="false" ipc-concordant="G11B7/0065" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/00656</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Counterpropagating holography</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B7/007" definition-exists="true" ipc-concordant="G11B7/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B7/007</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Arrangement of the information on the record carrier, e.g. form of tracks </text><CPC-specific-text><text>, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B7/00709" definition-exists="false" ipc-concordant="G11B7/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/00709</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dimensions of grooves or tracks, e.g. groove depth, track pitch</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="G11B7/00718" definition-exists="false" ipc-concordant="G11B7/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00718</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Groove and land recording, i.e. user data recorded both in the grooves and on the lands</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B7/00727" definition-exists="false" ipc-concordant="G11B7/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/00727</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where the information is modified to form a visible pattern, e.g. forming a label by modifying the width of pits or grooves</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="G11B7/00736" definition-exists="true" ipc-concordant="G11B7/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11B7/00736</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information </text><reference><text>sector headers or adresses in prepits <class-ref scheme="cpc">G11B7/00745</class-ref>; address data in track wobble <class-ref scheme="cpc">G11B7/24082</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="G11B7/00745" definition-exists="false" ipc-concordant="G11B7/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00745</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sectoring or header formats within a track </text><reference><text>formats in general <class-ref scheme="cpc">G11B20/12</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B7/00754" definition-exists="false" ipc-concordant="G11B7/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/00754</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Track shape, e.g. address or synchronisation information in wobbled track or sidewall</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B7/00763" definition-exists="false" ipc-concordant="G11B7/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/00763</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Track cross-section, e.g. V-shaped, trapezoidal</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="G11B7/00772" definition-exists="true" ipc-concordant="G11B7/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00772</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on record carriers storing information in the form of optical interference patterns, e.g. holograms</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="G11B7/00781" definition-exists="true" ipc-concordant="G11B7/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/00781</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary information, e.g. index marks, address marks, pre-pits, gray codes</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="G11B7/0079" definition-exists="false" ipc-concordant="G11B7/007" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11B7/0079</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Zoned data area, e.g. having different data structures or formats for the user data within data layer, Zone Constant Linear Velocity [ZCLV], Zone Constant Angular Velocity [ZCAV], carriers with RAM and ROM areas</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="G11B7/013" definition-exists="true" ipc-concordant="G11B7/013" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B7/013</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>for discrete information, i.e. where each information unit is stored in a distinct discrete location </text><CPC-specific-text><text>, e.g. digital information formats within a data block or sector</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="G11B7/0133" definition-exists="false" ipc-concordant="G11B7/013" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/0133</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of discrete information structures, e.g. shape or dimensions of pits, prepits</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="G11B7/0136" definition-exists="false" ipc-concordant="G11B7/013" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/0136</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where each location can have more than two values ('multivalue'), for data or prepits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B7/08" definition-exists="false" ipc-concordant="G11B7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Disposition or mounting of heads or light sources relatively to record carriers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B7/081" definition-exists="true" ipc-concordant="G11B7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for time base error correction by moving the light beam</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B7/082" definition-exists="false" ipc-concordant="G11B7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11B7/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Aligning the head or the light source relative to the record carrier otherwise than during transducing, e.g. adjusting tilt set screw during assembly of head</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="G11B7/083" definition-exists="true" ipc-concordant="G11B7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>relative to record carriers storing information in the form of optical interference patterns, e.g. holograms</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="G11B7/085" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B7/085</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>with provision for moving the light beam into, or out of, its operative position </text><CPC-specific-text><text>or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection</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="G11B7/08505" definition-exists="true" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08505</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methods for track change, selection or preliminary positioning by moving the head</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="G11B7/08511" definition-exists="true" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08511</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with focus pull-in only</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="G11B7/08517" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08517</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with tracking pull-in only</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="G11B7/08523" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08523</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with both tracking and focusing pull-in</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="G11B7/08529" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08529</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methods and circuits to control the velocity of the head as it traverses the tracks</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="G11B7/08535" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08535</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to maintain constant velocity during the traverse</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="G11B7/08541" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08541</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving track counting to determine position</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="G11B7/08547" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08547</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/08552" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08552</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electro-optical elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/08558" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08558</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using acousto-optical elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/08564" definition-exists="true" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08564</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using galvanomirrors</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="G11B7/0857" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0857</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for mechanically moving the whole head</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="G11B7/08576" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08576</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Swinging-arm positioners</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="G11B7/08582" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08582</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sled-type positioners</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="G11B7/08588" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08588</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with position sensing by means of an auxiliary system using an external scale</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="G11B7/08594" definition-exists="false" ipc-concordant="G11B7/085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/08594</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to access both sides of the disc with the same head assembly</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B7/09" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/0901" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0901</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for track following only </text><reference><text><class-ref scheme="cpc">G11B7/0925</class-ref>, <class-ref scheme="cpc">G11B7/094</class-ref>, <class-ref scheme="cpc">G11B7/0941</class-ref>, <class-ref scheme="cpc">G11B7/0943</class-ref>, <class-ref scheme="cpc">G11B7/0945</class-ref>, <class-ref scheme="cpc">G11B7/0946</class-ref>, <class-ref scheme="cpc">G11B7/0948</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/0903" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0903</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-beam tracking systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/0904" definition-exists="true" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0904</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dithered tracking systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/0906" definition-exists="true" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0906</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Differential phase difference 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="10" additional-only="false" sort-key="G11B7/0908" definition-exists="true" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0908</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for focusing only </text><reference><text><class-ref scheme="cpc">G11B7/0925</class-ref>, <class-ref scheme="cpc">G11B7/094</class-ref>, <class-ref scheme="cpc">G11B7/0941</class-ref>, <class-ref scheme="cpc">G11B7/0943</class-ref>, <class-ref scheme="cpc">G11B7/0945</class-ref>, <class-ref scheme="cpc">G11B7/0946</class-ref>, <class-ref scheme="cpc">G11B7/0948</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/0909" definition-exists="true" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0909</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by astigmatic methods</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="G11B7/0911" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0911</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by far-field method</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="G11B7/0912" definition-exists="true" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0912</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by push-pull method</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="G11B7/0914" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0914</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by non-optical methods, e.g. capacitive</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="G11B7/0916" definition-exists="true" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0916</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Foucault or knife-edge methods</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="G11B7/0917" definition-exists="true" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B7/0917</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Focus-error methods other than those covered by <class-ref scheme="cpc">G11B7/0909</class-ref> - <class-ref scheme="cpc">G11B7/0916</class-ref></text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/0919" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/0919</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Critical angle methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/092" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dither methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/0922" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/0922</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Far-field methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/0924" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/0924</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Skewed beams methods (using an angled beam, i.e. a beam which is reflected from the disc at an angle different from 90°)</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="G11B7/0925" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0925</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electromechanical actuators for lens positioning </text><reference><text><class-ref scheme="cpc">G11B7/0857</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="G11B7/0927" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0927</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for focusing only </text><reference><text><class-ref scheme="cpc">G11B7/0937</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/0929" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0929</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for tracking only </text><reference><text><class-ref scheme="cpc">G11B7/0937</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/093" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B7/093</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>for focusing and tracking </text><reference><text><class-ref scheme="cpc">G11B7/0932</class-ref> - <class-ref scheme="cpc">G11B7/0937</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/0932" definition-exists="true" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0932</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of sprung supports</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="G11B7/0933" definition-exists="true" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0933</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of stationary parts</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/0935" definition-exists="true" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0935</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of the moving parts</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/0937" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0937</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Piezo-electric actuators</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="G11B7/0938" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0938</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>servo format, e.g. guide tracks, pilot signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/094" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/094</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methods and circuits for servo offset compensation</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="G11B7/0941" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0941</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methods and circuits for servo gain or phase compensation during operation </text><reference><text>for initialising servos <class-ref scheme="cpc">G11B7/0945</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="G11B7/0943" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0943</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methods and circuits for performing mathematical operations on individual detector segment outputs</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="G11B7/0945" definition-exists="true" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0945</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methods for initialising servos, start-up sequences</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="G11B7/0946" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0946</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for operation during external perturbations not related to the carrier or servo beam, e.g. vibration</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="G11B7/0948" definition-exists="false" ipc-concordant="G11B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0948</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for detection and avoidance or compensation of imperfections on the carrier, e.g. dust, scratches, dropouts </text><reference><text><class-ref scheme="cpc">G11B7/095</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="G11B7/095" definition-exists="false" ipc-concordant="G11B7/095" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/095</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for discs, e.g. for compensation of eccentricity or wobble</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/0953" definition-exists="true" ipc-concordant="G11B7/095" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0953</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to compensate for eccentricity of the disc or disc tracks</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="G11B7/0956" definition-exists="true" ipc-concordant="G11B7/095" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/0956</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B7/10" definition-exists="false" ipc-concordant="G11B7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Interchangeable mountings, e.g. for replacement of head without readjustment </text><CPC-specific-text><text>including interchangeable electrical adjuster boards</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="G11B7/12" definition-exists="true" ipc-concordant="G11B7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B7/12</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Heads, e.g. forming of the optical beam spot or modulation of the optical beam </text><reference><text>disposition or mounting of head elements within housing or with provision for moving of light source, optical beam or detector, irrelevant to the transducing method <class-ref scheme="cpc">G11B7/08</class-ref> </text><CPC-specific-text><text>; modulating lasers <class-ref scheme="cpc">H01S3/10</class-ref>; controlling the intensity, colour, phase, polarisation or direction of light beams arriving from an independent light source, e.g. switching gating or modulating <class-ref scheme="cpc">G02F1/00</class-ref></text></CPC-specific-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="G11B7/121" definition-exists="true" ipc-concordant="G11B7/121" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Protecting the head, e.g. against dust or impact with the record carrier</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="G11B7/122" definition-exists="false" ipc-concordant="G11B7/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Flying-type heads, e.g. analogous to Winchester type in magnetic recording</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="G11B7/123" definition-exists="false" ipc-concordant="G11B7/123" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integrated head arrangements, e.g. with source and detectors mounted on the same substrate</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/124" definition-exists="false" ipc-concordant="G11B7/124" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/124</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the integrated head arrangements including waveguides</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/1245" definition-exists="true" ipc-concordant="G11B7/1245" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B7/1245</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>the waveguides including means for electro-optical or acousto-optical deflection</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="G11B7/125" definition-exists="true" ipc-concordant="G11B7/125" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B7/125</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices</text></title-part><title-part><text>Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/126" definition-exists="false" ipc-concordant="G11B7/126" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circuits, methods or arrangements for laser control or stabilisation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/1263" definition-exists="true" ipc-concordant="G11B7/1263" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1263</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Power control during transducing, e.g. by monitoring</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="G11B7/1267" definition-exists="false" ipc-concordant="G11B7/1267" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1267</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Power calibration</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="G11B7/127" definition-exists="true" ipc-concordant="G11B7/127" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lasers</text></title-part><title-part><text>Multiple laser arrays </text><CPC-specific-text><reference><text>lasers <u>per se</u> <class-ref scheme="cpc">H01S</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="G11B7/1275" definition-exists="false" ipc-concordant="G11B7/1275" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1275</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Two or more lasers having different wavelengths</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="G11B7/128" definition-exists="true" ipc-concordant="G11B7/128" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/128</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modulators </text><reference><text><class-ref scheme="cpc">G11B7/1245</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="G11B7/13" definition-exists="true" ipc-concordant="G11B7/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B7/13</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Optical detectors therefor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/131" definition-exists="false" ipc-concordant="G11B7/131" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/131</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangement of detectors in a multiple array</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="G11B7/133" definition-exists="true" ipc-concordant="G11B7/133" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/133</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shape of individual detector elements</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="G11B7/135" definition-exists="true" ipc-concordant="G11B7/135" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11B7/135</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for guiding the beam from the source to the record carrier or from the record carrier to the detector</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/1353" definition-exists="true" ipc-concordant="G11B7/1353" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1353</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diffractive elements, e.g. holograms or gratings </text><CPC-specific-text><reference><text>diffraction gratings <u>per se</u> <class-ref scheme="cpc">G02B5/18</class-ref>; holograms <u>per se</u> <class-ref scheme="cpc">G02B5/32</class-ref>; grating systems <class-ref scheme="cpc">G02B27/44</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="G11B7/1356" definition-exists="false" ipc-concordant="G11B7/1356" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1356</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Double or multiple prisms, i.e. having two or more prisms in cooperation</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="G11B7/1359" definition-exists="true" ipc-concordant="G11B7/1359" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1359</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Single prisms</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="G11B7/1362" definition-exists="false" ipc-concordant="G11B7/1362" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1362</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mirrors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/1365" definition-exists="true" ipc-concordant="G11B7/1365" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1365</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separate or integrated refractive elements, e.g. wave plates</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>In this group, integrated combinations of a refractive element, such as a coating element or phase plate, with another element, such as a lens, are classified in this group and in other appropriate groups for the other element.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/1367" definition-exists="true" ipc-concordant="G11B7/1367" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1367</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Stepped phase plates</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="G11B7/1369" definition-exists="true" ipc-concordant="G11B7/1369" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1369</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Active plates, e.g. liquid crystal panels or electrostrictive elements</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="G11B7/1372" definition-exists="true" ipc-concordant="G11B7/1372" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1372</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lenses</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B7/13722" definition-exists="false" ipc-concordant="G11B7/1372" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/13722</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fresnel lenses</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="G11B7/13725" definition-exists="false" ipc-concordant="G11B7/1372" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-01-01" status="published"><classification-symbol>G11B2007/13725</classification-symbol><class-title date-revised="2017-01-01"><title-part><CPC-specific-text><text>Catadioptric lenses, i.e. having at least one internal reflective surface</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="G11B7/13727" definition-exists="false" ipc-concordant="G11B7/1372" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/13727</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing</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="G11B7/1374" definition-exists="true" ipc-concordant="G11B7/1374" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1374</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Objective lenses </text><CPC-specific-text><reference><text>optical objectives <u>per se</u> <class-ref scheme="cpc">G02B9/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/1376" definition-exists="true" ipc-concordant="G11B7/1376" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1376</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Collimator lenses </text><CPC-specific-text><reference><text>collimators <u>per se</u> <class-ref scheme="cpc">G02B27/30</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/1378" definition-exists="true" ipc-concordant="G11B7/1378" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1378</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separate aberration correction lenses</text></title-part><title-part><text>Cylindrical lenses to generate astigmatism</text></title-part><title-part><text>Beam expanders</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="G11B7/1381" definition-exists="true" ipc-concordant="G11B7/1381" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1381</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops </text><reference><text><class-ref scheme="cpc">G11B7/1353</class-ref> - <class-ref scheme="cpc">G11B7/1369</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/1384" definition-exists="true" ipc-concordant="G11B7/1384" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1384</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fibre optics</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="G11B7/1387" definition-exists="true" ipc-concordant="G11B7/1387" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1387</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using the near-field effect</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="G11B7/139" definition-exists="true" ipc-concordant="G11B7/139" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/139</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Numerical aperture control means</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="G11B7/1392" definition-exists="true" ipc-concordant="G11B7/1392" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1392</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for controlling the beam wavefront, e.g. for correction of aberration </text><CPC-specific-text><reference><text>optical systems for aberration correction <u>per se</u> <class-ref scheme="cpc">G02B27/00</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="G11B7/13922" definition-exists="true" ipc-concordant="G11B7/1392" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/13922</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>passive</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="G11B7/13925" definition-exists="true" ipc-concordant="G11B7/1392" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/13925</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>active, e.g. controlled by electrical or mechanical means</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="G11B7/13927" definition-exists="true" ipc-concordant="G11B7/1392" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/13927</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>during transducing, e.g. to correct for variation of the spherical aberration due to disc tilt or irregularities in the cover layer thickness</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="G11B7/1395" definition-exists="true" ipc-concordant="G11B7/1395" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11B7/1395</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam splitters or combiners </text><reference><text><class-ref scheme="cpc">G11B7/1353</class-ref>, <class-ref scheme="cpc">G11B7/1356</class-ref> take precedence </text><CPC-specific-text><text>; beam splitting or combining <u>per se</u> <class-ref scheme="cpc">G02B27/10</class-ref></text></CPC-specific-text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/1398" definition-exists="true" ipc-concordant="G11B7/1398" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/1398</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for shaping the cross-section of the beam, e.g. into circular or elliptical cross-section</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="G11B7/14" definition-exists="false" ipc-concordant="G11B7/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted to record on, or to reproduce from, more than one track simultaneously</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="G11B7/22" definition-exists="false" ipc-concordant="G11B7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus or processes for the manufacture of optical heads, e.g. assembly</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="G11B7/24" definition-exists="false" ipc-concordant="G11B7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Record carriers characterised by shape, structure or physical properties, or by the selection of the material </text><reference><text>characterised by the arrangement of information on the carrier <class-ref scheme="cpc">G11B7/007</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="G11B7/240004" definition-exists="false" ipc-concordant="G11B7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/240004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the form of the carrier</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="G11B7/240008" definition-exists="false" ipc-concordant="G11B7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/240008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cards</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B7/240012" definition-exists="false" ipc-concordant="G11B7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/240012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>intended for rotation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B7/240017" definition-exists="false" ipc-concordant="G11B7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/240017</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tapes</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="G11B7/240021" definition-exists="false" ipc-concordant="G11B7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/240021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cylinders</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B7/240025" definition-exists="true" ipc-concordant="G11B7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/240025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for storing optical interference patterns, e.g. holograms</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="G11B7/24003" definition-exists="false" ipc-concordant="G11B7/24003" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-02-01" status="published"><classification-symbol>G11B7/24003</classification-symbol><class-title date-revised="2017-02-01"><title-part><text>Shapes of record carriers other than disc shape</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/24006" definition-exists="false" ipc-concordant="G11B7/24006" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24006</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cylindrical or shaft-shaped</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="G11B7/24009" definition-exists="false" ipc-concordant="G11B7/24009" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24009</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tapes, long films or long sheets</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="G11B7/24012" definition-exists="false" ipc-concordant="G11B7/24012" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24012</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical cards</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="G11B7/24015" definition-exists="false" ipc-concordant="G11B7/24015" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-02-01" status="published"><classification-symbol>G11B7/24015</classification-symbol><class-title date-revised="2017-02-01"><title-part><text>Air-sandwiched discs</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> When classifying in this group, classification is also made in group <class-ref scheme="cpc">G11B7/2403</class-ref> if the subject matter disclosed in the context of an air-sandwiched disc is of more general application </note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B7/24018" definition-exists="false" ipc-concordant="G11B7/24018" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-02-01" status="published"><classification-symbol>G11B7/24018</classification-symbol><class-title date-revised="2017-02-01"><title-part><text>Laminated discs </text><reference><text><class-ref scheme="cpc">G11B7/24015</class-ref> takes precedence</text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> When classifying in this group, classification is also made in group <class-ref scheme="cpc">G11B7/2403</class-ref> if the subject matter disclosed in the context of a laminated disc is of more general application </note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/24021" definition-exists="false" ipc-concordant="G11B7/24021" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24021</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>provided with a special shape or structure for centering or eccentricity prevention, e.g. alignment</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="G11B7/24024" definition-exists="false" ipc-concordant="G11B7/24024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24024</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adhesion or bonding, e.g. specific adhesive layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/24027" definition-exists="false" ipc-concordant="G11B7/24027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24027</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Layers</text></title-part><title-part><text>Shape, structure or physical properties thereof </text><reference><text><class-ref scheme="cpc">G11B7/24021</class-ref>, <class-ref scheme="cpc">G11B7/24024</class-ref> take precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B7/2403" definition-exists="false" ipc-concordant="G11B7/2403" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2403</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Layers</text></title-part><title-part><text>Shape, structure or physical properties thereof</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/24033" definition-exists="false" ipc-concordant="G11B7/24033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrode layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/24035" definition-exists="false" ipc-concordant="G11B7/24035" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24035</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recording layers </text><reference><text>substrates also used as recording layers <class-ref scheme="cpc">G11B7/24047</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/24038" definition-exists="false" ipc-concordant="G11B7/24038" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24038</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple laminated recording layers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/24041" definition-exists="false" ipc-concordant="G11B7/24041" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24041</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with different recording characteristics</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="G11B7/24044" definition-exists="false" ipc-concordant="G11B7/24044" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24044</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for storing optical interference patterns, e.g. holograms</text></title-part><title-part><text>for storing data in three dimensions, e.g. volume storage </text><reference><text><class-ref scheme="cpc">G11B7/24038</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="10" additional-only="false" sort-key="G11B7/24047" definition-exists="false" ipc-concordant="G11B7/24047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24047</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Substrates</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/2405" definition-exists="false" ipc-concordant="G11B7/2405" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2405</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>being also used as track layers of pre-formatted layers </text><reference><text>tracks or pits <class-ref scheme="cpc">G11B7/2407</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/24053" definition-exists="false" ipc-concordant="G11B7/24053" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24053</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Protective topcoat layers lying opposite to the light entrance side, e.g. layers for preventing electrostatic charging</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="G11B7/24056" definition-exists="false" ipc-concordant="G11B7/24056" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-02-01" status="published"><classification-symbol>G11B7/24056</classification-symbol><class-title date-revised="2017-02-01"><title-part><text>Light transmission layers lying on the light entrance side and being thinner than the substrate, e.g. specially adapted for Blu-ray® discs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/24059" definition-exists="false" ipc-concordant="G11B7/24059" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24059</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for near-field recording or reproduction</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="G11B7/24062" definition-exists="false" ipc-concordant="G11B7/24062" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24062</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reflective layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/24065" definition-exists="true" ipc-concordant="G11B7/24065" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24065</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Layers assisting in recording or reproduction below the optical diffraction limit, e.g. non-linear optical layers or structures </text><reference><text>cover layers for near-field media <class-ref scheme="cpc">G11B7/24059</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/24067" definition-exists="false" ipc-concordant="G11B7/24067" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24067</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combinations of two or more layers with specific interrelation</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="G11B7/2407" definition-exists="false" ipc-concordant="G11B7/2407" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2407</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tracks or pits</text></title-part><title-part><text>Shape, structure or physical properties thereof </text><reference><text>layout of tracks or pits used as the identification information <class-ref scheme="cpc">G11B7/007</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="G11B7/24073" definition-exists="false" ipc-concordant="G11B7/24073" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24073</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tracks</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/24076" definition-exists="false" ipc-concordant="G11B7/24076" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-02-01" status="published"><classification-symbol>G11B7/24076</classification-symbol><class-title date-revised="2017-02-01"><title-part><text>Cross sectional shape in the radial direction of a disc, e.g. asymmetrical cross sectional shape</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/24079" definition-exists="false" ipc-concordant="G11B7/24079" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24079</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Width or depth </text><reference><text><class-ref scheme="cpc">G11B7/24076</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/24082" definition-exists="false" ipc-concordant="G11B7/24082" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24082</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Meandering</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="G11B7/24085" definition-exists="false" ipc-concordant="G11B7/24085" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24085</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pits</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/24088" definition-exists="false" ipc-concordant="G11B7/24088" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24088</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for storing more than two values, i.e. multi-valued recording for data or prepits</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="G11B7/24091" definition-exists="false" ipc-concordant="G11B7/24091" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24091</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combinations of pits and tracks with specific interrelation</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="G11B7/24094" definition-exists="false" ipc-concordant="G11B7/24094" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/24094</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indication parts or information parts for identification</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="G11B7/24097" definition-exists="false" ipc-concordant="G11B7/24097" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-02-01" status="published"><classification-symbol>G11B7/24097</classification-symbol><class-title date-revised="2017-02-01"><title-part><text>Structures for detection, control, recording operation or replay operation</text></title-part><title-part><text>Special shapes or structures for centering or eccentricity prevention </text><reference><text>within laminated discs <class-ref scheme="cpc">G11B7/24021</class-ref></text></reference></title-part><title-part><text>Arrangements for testing, inspecting or evaluating</text></title-part><title-part><text>Containers, cartridges or cassettes</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> When classifying in this group, classification is also made in group <class-ref scheme="cpc">G11B23/00</class-ref> if the subject matter disclosed in the context of an optical record carrier is of more general application </note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B7/241" definition-exists="true" ipc-concordant="G11B7/241" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/241</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised by the selection of the material</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/242" definition-exists="false" ipc-concordant="G11B7/242" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/242</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of recording layers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/243" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/243</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising inorganic materials only, e.g. ablative layers</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/24302" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Metals or metalloids</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24304" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24304</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>group 2 or 12 elements (e.g. Be, Ca, Mg, Zn, Cd)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24306" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24306</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>transition metal elements of groups 3-10</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24308" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24308</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>transition metal elements of group 11 (Cu, Ag, Au)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/2431" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/2431</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>group 13 elements (B, Al, Ga, In)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24312" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24312</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>group 14 elements (e.g. Si, Ge, Sn)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24314" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24314</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>group 15 elements (e.g. Sb, Bi)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24316" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24316</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>group 16 elements (i.e. chalcogenides, Se, Te)</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/24318" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24318</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Non-metallic elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/2432" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/2432</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Oxygen</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24322" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24322</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Nitrogen</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24324" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24324</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sulfur</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24326" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24326</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Halides (F, CI, Br...)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24328" definition-exists="false" ipc-concordant="G11B7/243" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24328</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Carbon</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/2433" definition-exists="false" ipc-concordant="G11B7/2433" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B7/2433</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Metals or elements of groups 13, 14, 15 or 16 of the Periodic System, e.g. B, Si, Ge, As, Sb, Bi, Se or Te</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/2437" definition-exists="false" ipc-concordant="G11B7/2437" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2437</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Non-metallic elements</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="G11B7/244" definition-exists="false" ipc-concordant="G11B7/244" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/244</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising organic materials only</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/2445" definition-exists="false" ipc-concordant="G11B7/244" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/2445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing an azulene compound</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/245" definition-exists="false" ipc-concordant="G11B7/245" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>containing a polymeric component</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/246" definition-exists="false" ipc-concordant="G11B7/246" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/246</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>containing dyes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24606" definition-exists="false" ipc-concordant="G11B7/246" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24606</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Azo- dyes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24612" definition-exists="false" ipc-concordant="G11B7/246" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24612</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>two or more dyes in one layer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24618" definition-exists="false" ipc-concordant="G11B7/246" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24618</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>two or more dyes in two or more different layers, e.g. one dye absorbing at 405 nm in layer one and a different dye absorbing at 650 nm in layer two</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24624" definition-exists="false" ipc-concordant="G11B7/246" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24624</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>fluorescent dyes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2463" definition-exists="false" ipc-concordant="G11B7/2463" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2463</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>azulene</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2467" definition-exists="false" ipc-concordant="G11B7/2467" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2467</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>azo-dyes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/247" definition-exists="false" ipc-concordant="G11B7/247" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/247</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>methine or polymethine dyes</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="G11B7/24705" definition-exists="false" ipc-concordant="G11B7/247" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24705</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cyanine</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="G11B7/2471" definition-exists="false" ipc-concordant="G11B7/247" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/2471</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Merocyanine</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="G11B7/24715" definition-exists="false" ipc-concordant="G11B7/247" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24715</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Oxonol</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B7/2472" definition-exists="false" ipc-concordant="G11B7/2472" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2472</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>cyanine</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B7/2475" definition-exists="false" ipc-concordant="G11B7/2475" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2475</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>merocyanine</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B7/2478" definition-exists="false" ipc-concordant="G11B7/2478" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2478</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>oxonol</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/248" definition-exists="false" ipc-concordant="G11B7/248" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/248</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>porphines</text></title-part><title-part><text>azaporphines, e.g. phthalocyanines</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/249" definition-exists="false" ipc-concordant="G11B7/249" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/249</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>containing organometallic compounds </text><reference><text><class-ref scheme="cpc">G11B7/246</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24905" definition-exists="false" ipc-concordant="G11B7/249" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24905</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>neutral</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/2491" definition-exists="false" ipc-concordant="G11B7/249" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/2491</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as anion</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/24915" definition-exists="false" ipc-concordant="G11B7/249" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/24915</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as cation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2492" definition-exists="false" ipc-concordant="G11B7/2492" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2492</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>neutral compounds</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2495" definition-exists="false" ipc-concordant="G11B7/2495" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2495</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>as anions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2498" definition-exists="false" ipc-concordant="G11B7/2498" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2498</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>as cations</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/25" definition-exists="false" ipc-concordant="G11B7/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>containing liquid crystals</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="G11B7/251" definition-exists="false" ipc-concordant="G11B7/251" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/251</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising inorganic materials dispersed in an organic matrix</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="G11B7/252" definition-exists="false" ipc-concordant="G11B7/252" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B7/252</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of layers other than recording layers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/253" definition-exists="false" ipc-concordant="G11B7/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/253</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of substrates</text></title-part></class-title>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/25301" definition-exists="false" ipc-concordant="G11B7/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25301</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising glass</text></CPC-specific-text></title-part></class-title></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/25302" definition-exists="false" ipc-concordant="G11B7/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising metals</text></CPC-specific-text></title-part></class-title></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/25303" definition-exists="false" ipc-concordant="G11B7/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25303</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising resins</text></CPC-specific-text></title-part></class-title>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25304" definition-exists="false" ipc-concordant="G11B7/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25304</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polycarbonate [PC]</text></CPC-specific-text></title-part></class-title></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25305" definition-exists="false" ipc-concordant="G11B7/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polyester, e.g. PET, PETG, PEN</text></CPC-specific-text></title-part></class-title></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25306" definition-exists="false" ipc-concordant="G11B7/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25306</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polystyrene [PS]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25307" definition-exists="false" ipc-concordant="G11B7/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25307</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polycycloolefines [COCs]</text></CPC-specific-text></title-part></class-title></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25308" definition-exists="false" ipc-concordant="G11B7/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25308</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Biodegradable polymers, cellulose included</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/2531" definition-exists="false" ipc-concordant="G11B7/2531" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2531</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising glass</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/2532" definition-exists="false" ipc-concordant="G11B7/2532" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2532</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising metals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/2533" definition-exists="false" ipc-concordant="G11B7/2533" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2533</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising resins</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2534" definition-exists="false" ipc-concordant="G11B7/2534" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2534</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>polycarbonates [PC]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2535" definition-exists="false" ipc-concordant="G11B7/2535" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2535</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>polyesters, e.g. PET, PETG or PEN</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2536" definition-exists="false" ipc-concordant="G11B7/2536" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2536</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>polystyrene [PS]</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2537" definition-exists="false" ipc-concordant="G11B7/2537" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2537</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>epoxy resins</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2538" definition-exists="false" ipc-concordant="G11B7/2538" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2538</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>polycycloolefins [PCO]</text></title-part></class-title></classification-item>
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|
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2539" definition-exists="false" ipc-concordant="G11B7/2539" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2539</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>biodegradable polymers, e.g. cellulose</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/254" definition-exists="false" ipc-concordant="G11B7/254" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/254</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of protective topcoat layers</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/25402" definition-exists="false" ipc-concordant="G11B7/254" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25402</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting essentially of organic resins</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25405" definition-exists="false" ipc-concordant="G11B7/254" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising inorganic filler, e.g. particles, fibres</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/25408" definition-exists="false" ipc-concordant="G11B7/254" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25408</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting essentially of inorganic materials</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25411" definition-exists="false" ipc-concordant="G11B7/254" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25411</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing transition metal elements (Zn, Fe, Co, Ni, Pt)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25414" definition-exists="false" ipc-concordant="G11B7/254" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25414</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing Group 13 elements (B, Al, Ga)</text></CPC-specific-text></title-part></class-title></classification-item>
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|
<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25417" definition-exists="false" ipc-concordant="G11B7/254" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25417</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing Group 14 elements (C, Si, Ge, Sn)</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/2542" definition-exists="false" ipc-concordant="G11B7/2542" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2542</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>consisting essentially of organic resins</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2545" definition-exists="false" ipc-concordant="G11B7/2545" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2545</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>containing inorganic fillers, e.g. particles or fibres</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/2548" definition-exists="false" ipc-concordant="G11B7/2548" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2548</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>consisting essentially of inorganic materials</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="G11B7/256" definition-exists="false" ipc-concordant="G11B7/256" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/256</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of layers improving adhesion between layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B7/257" definition-exists="false" ipc-concordant="G11B7/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/257</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/25701" definition-exists="false" ipc-concordant="G11B7/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25701</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting essentially of organic materials</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25703" definition-exists="false" ipc-concordant="G11B7/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25703</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Resins</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/25705" definition-exists="false" ipc-concordant="G11B7/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25705</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consisting essentially of inorganic materials</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25706" definition-exists="false" ipc-concordant="G11B7/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25706</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing transition metal elements (Zn, Fe, Co, Ni, Pt)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25708" definition-exists="false" ipc-concordant="G11B7/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25708</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing group 13 elements (B, Al, Ga)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/2571" definition-exists="false" ipc-concordant="G11B7/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/2571</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing group 14 elements except carbon (Si, Ge, Sn, Pb)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25711" definition-exists="false" ipc-concordant="G11B7/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25711</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing carbon</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25713" definition-exists="false" ipc-concordant="G11B7/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25713</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing nitrogen</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25715" definition-exists="false" ipc-concordant="G11B7/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25715</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing oxygen</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25716" definition-exists="false" ipc-concordant="G11B7/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25716</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing sulfur</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B7/25718" definition-exists="false" ipc-concordant="G11B7/257" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/25718</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing halides (F, Cl, Br, l)</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/2572" definition-exists="false" ipc-concordant="G11B7/2572" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2572</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>consisting essentially of organic materials</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B7/2575" definition-exists="false" ipc-concordant="G11B7/2575" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2575</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>resins</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/2578" definition-exists="false" ipc-concordant="G11B7/2578" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2578</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>consisting essentially of inorganic materials</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="G11B7/258" definition-exists="false" ipc-concordant="G11B7/258" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/258</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of reflective layers</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/2581" definition-exists="false" ipc-concordant="G11B7/258" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/2581</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on aluminium</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/2582" definition-exists="false" ipc-concordant="G11B7/258" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/2582</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on silver</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B7/2583" definition-exists="false" ipc-concordant="G11B7/258" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2007/2583</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on gold</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/2585" definition-exists="false" ipc-concordant="G11B7/2585" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2585</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>based on aluminium</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/259" definition-exists="false" ipc-concordant="G11B7/259" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/259</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>based on silver</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B7/2595" definition-exists="false" ipc-concordant="G11B7/2595" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/2595</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>based on gold</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B7/26" definition-exists="true" ipc-concordant="G11B7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B7/26</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Apparatus or processes specially adapted for the manufacture of record carriers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B7/261" definition-exists="true" ipc-concordant="G11B7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Preparing a master, e.g. exposing photoresist, electroforming</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="G11B7/263" definition-exists="true" ipc-concordant="G11B7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Preparing and using a stamper, e.g. pressing or injection molding substrates </text><reference><text>production of optical record carriers, e.g. optical discs <class-ref scheme="cpc">B29D17/005</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="10" additional-only="false" sort-key="G11B7/265" definition-exists="true" ipc-concordant="G11B7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11B7/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Apparatus for the mass production of optical record carriers, e.g. complete production stations, transport systems</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="G11B7/266" definition-exists="true" ipc-concordant="G11B7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11B7/266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sputtering or spin-coating layers </text><reference><text>sputtering in general <class-ref scheme="cpc">C23C14/24</class-ref>; spin-coating in general <class-ref scheme="cpc">B05D1/005</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="10" additional-only="false" sort-key="G11B7/268" definition-exists="true" ipc-concordant="G11B7/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G11B7/268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Post-production operations, e.g. initialising phase-change recording layers, checking for defects </text><reference><text>investigating the presence of flaws or contamination in optical discs <class-ref scheme="cpc">G01N21/9506</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B7/28" definition-exists="false" ipc-concordant="G11B7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B7/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers</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="G11B9/00" definition-exists="true" ipc-concordant="G11B9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B9/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Recording or reproducing using a method not covered by one of the main groups <class-ref scheme="cpc">G11B3/00</class-ref> - <class-ref scheme="cpc">G11B7/00</class-ref></text></title-part><title-part><text>Record carriers therefor </text><reference><text><class-ref scheme="cpc">G11B11/00</class-ref> takes precedence </text><CPC-specific-text><text>driving or moving of heads <class-ref scheme="cpc">G11B21/02</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B9/02" definition-exists="false" ipc-concordant="G11B9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ferroelectric record carriers</text></title-part><title-part><text>Record carriers therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B9/04" definition-exists="false" ipc-concordant="G11B9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using record carriers having variable electric resistance</text></title-part><title-part><text>Record carriers therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B9/06" definition-exists="false" ipc-concordant="G11B9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using record carriers having variable electrical capacitance</text></title-part><title-part><text>Record carriers therefor </text><reference><text><class-ref scheme="cpc">G11B9/02</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="G11B9/061" definition-exists="false" ipc-concordant="G11B9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Record carriers characterised by their structure or form or by the selection of the material; Apparatus or processes specially adapted for the manufacture of record carriers </text><reference><text>processes involving a single technical art and for which provision exists elsewhere, <u>see</u> the relevant class, e.g. <class-ref scheme="cpc">B05D</class-ref>, <class-ref scheme="cpc">F16N</class-ref>, <class-ref scheme="cpc">C08L</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="G11B9/062" definition-exists="false" ipc-concordant="G11B9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the form, e.g. comprising mechanical protection elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B9/063" definition-exists="false" ipc-concordant="G11B9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the selection of the material</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="G11B9/065" definition-exists="false" ipc-concordant="G11B9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G11B9/065</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>Additional layers for lubrication, wear protection or elimination of electrostatic charges of the interface between record carrier and head </text><reference><text><class-ref scheme="cpc">G11B9/066</class-ref>, <class-ref scheme="cpc">G11B9/067</class-ref> and <class-ref scheme="cpc">G11B9/068</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B9/066" definition-exists="false" ipc-concordant="G11B9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrically conductive layers </text><reference><text><class-ref scheme="cpc">G11B9/068</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B9/067" definition-exists="false" ipc-concordant="G11B9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dielectric layers; Processes for providing electrical conductivity to them </text><reference><text><class-ref scheme="cpc">G11B9/068</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B9/068" definition-exists="false" ipc-concordant="G11B9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Moulding resin compositions</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B9/07" definition-exists="false" ipc-concordant="G11B9/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Heads for reproducing capacitive information</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B9/075" definition-exists="false" ipc-concordant="G11B9/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical contact with record carrier, e.g. by stylus</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B9/08" definition-exists="false" ipc-concordant="G11B9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electrostatic charge injection</text></title-part><title-part><text>Record carriers therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B9/10" definition-exists="false" ipc-concordant="G11B9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electron beam</text></title-part><title-part><text>Record carriers therefor </text><reference><text><class-ref scheme="cpc">G11B9/08</class-ref> takes precedence </text><CPC-specific-text><text><u>see</u> provisional also <class-ref scheme="cpc">G11B11/03</class-ref></text></CPC-specific-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="G11B9/12" definition-exists="false" ipc-concordant="G11B9/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using near-field interactions</text></title-part><title-part><text>Record carriers therefor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B9/14" definition-exists="false" ipc-concordant="G11B9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using microscopic probe means </text><CPC-specific-text><text>, i.e. recording or reproducing by means directly associated with the tip of a microscopic electrical probe as used in Scanning Tunneling Microscopy [STM] or Atomic Force Microscopy [AFM] for inducing physical or electrical perturbations in a recording medium; Record carriers or media specially adapted for such transducing of information </text><reference><text>marking using electrical current <class-ref scheme="cpc">B41M5/20</class-ref>; measuring roughness or irregularity of surfaces <class-ref scheme="cpc">G01B7/34</class-ref>; details of scanning-probe microscopes <class-ref scheme="cpc">G01Q</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="G11B9/1409" definition-exists="false" ipc-concordant="G11B9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/1409</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heads</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="G11B9/1418" definition-exists="false" ipc-concordant="G11B9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/1418</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disposition or mounting of heads or record carriers </text><reference><text><class-ref scheme="cpc">G11B17/00</class-ref> and <class-ref scheme="cpc">G11B19/00</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B9/1427" definition-exists="false" ipc-concordant="G11B9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/1427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for moving the heads or record carriers relatively to each other or for access to indexed parts without effectively imparting a relative movement</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="G11B9/1436" definition-exists="false" ipc-concordant="G11B9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/1436</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for moving the heads or record carriers relatively to each other</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B9/1445" definition-exists="false" ipc-concordant="G11B9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/1445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>switching at least one head in operating function; Controlling the relative spacing to keep the head operative, e.g. for allowing a tunnel current flow</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B9/1454" definition-exists="false" ipc-concordant="G11B9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/1454</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Positioning the head or record carrier into or out of operative position or across information tracks; Alignment of the head relative to the surface of the record carrier </text><reference><text><class-ref scheme="cpc">G11B9/1445</class-ref> takes precedence</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="10" additional-only="false" sort-key="G11B9/1463" definition-exists="false" ipc-concordant="G11B9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/1463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Record carriers for recording or reproduction involving the use of microscopic probe means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B9/1472" definition-exists="false" ipc-concordant="G11B9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/1472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the form</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="G11B9/1481" definition-exists="false" ipc-concordant="G11B9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/1481</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary features, e.g. reference or indexing surfaces</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="G11B9/149" definition-exists="false" ipc-concordant="G11B9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B9/149</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the memorising material or structure</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="G11B11/00" definition-exists="true" ipc-concordant="G11B11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B11/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups <class-ref scheme="cpc">G11B3/00</class-ref> - <class-ref scheme="cpc">G11B7/00</class-ref> or by different subgroups of group <class-ref scheme="cpc">G11B9/00</class-ref></text></title-part><title-part><text>Record carriers therefor </text><CPC-specific-text><reference><text>driving or moving of heads <class-ref scheme="cpc">G11B3/02</class-ref>, <class-ref scheme="cpc">G11B5/48</class-ref>, <class-ref scheme="cpc">G11B7/08</class-ref>, <class-ref scheme="cpc">G11B21/02</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Groups <class-ref scheme="cpc">G11B11/00</class-ref> - <class-ref scheme="cpc">G11B11/14</class-ref> mainly cover: <subnote type="bullet"><note-paragraph>combined systems or apparatus comprising both recording and reproducing using different methods; </note-paragraph><note-paragraph>record carriers therefor. </note-paragraph></subnote></note-paragraph><note-paragraph> Reading only or recording only using mechanical, magnetic, optical or other methods is covered by groups <class-ref scheme="cpc">G11B3/00</class-ref> - <class-ref scheme="cpc">G11B9/08</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="G11B11/002" definition-exists="false" ipc-concordant="G11B11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using recording by perturbation of the physical or electrical structure</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B11/005" definition-exists="false" ipc-concordant="G11B11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with reproducing by using non-optical beam of radiation or particles, e.g. electrons, directly interacting with the memorised information </text><reference><text><class-ref scheme="cpc">G11B11/007</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="G11B11/007" definition-exists="false" ipc-concordant="G11B11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with reproducing by means directly associated with the tip of a microscopic electrical probe as defined in <class-ref scheme="cpc">G11B9/14</class-ref> </text><reference><text>details of heads <class-ref scheme="cpc">G11B9/1409</class-ref>; disposition or mounting of heads <class-ref scheme="cpc">G11B9/1418</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="G11B11/03" definition-exists="false" ipc-concordant="G11B11/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B11/03</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>using recording by deforming with non-mechanical means, e.g. laser, beam of particles </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B11/002</class-ref> takes precedence; <u>see</u> proviosional also <class-ref scheme="cpc">G11B3/68</class-ref> - <class-ref scheme="cpc">G11B3/72</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="G11B11/05" definition-exists="false" ipc-concordant="G11B11/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with reproducing by capacitive means </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B9/07</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B11/06" definition-exists="false" ipc-concordant="G11B11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with reproducing by mechanical sensing</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="G11B11/08" definition-exists="false" ipc-concordant="G11B11/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using recording by electric charge or by variation of electric resistance or capacitance </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B11/002</class-ref>, <class-ref scheme="cpc">G11B11/10</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B11/10" definition-exists="false" ipc-concordant="G11B11/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using recording by magnetic means </text><CPC-specific-text><text>or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B11/105" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-02-01" status="published"><classification-symbol>G11B11/105</classification-symbol><class-title date-revised="2021-02-01"><title-part><text>using a beam of light or a magnetic field for recording </text><CPC-specific-text><text>by change of magnetisation</text></CPC-specific-text><text> and a beam of light for reproducing, </text><CPC-specific-text><text>i.e. magneto-optical,</text></CPC-specific-text><text> e.g. light-induced thermomagnetic recording, </text><CPC-specific-text><text>spin magnetisation recording,</text></CPC-specific-text><text> Kerr </text><CPC-specific-text><text>or Faraday</text></CPC-specific-text><text> effect reproducing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B11/10502" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10502</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the transducing operation to be executed</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="G11B11/10504" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10504</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Recording </text><reference><text>for shaping of magnetic domains <class-ref scheme="cpc">G11B11/10528</class-ref>, for compensation of shift <class-ref scheme="cpc">G11B11/1053</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B11/10506" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10506</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by modulating only the light beam of the transducer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B11/10508" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10508</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by modulating only the magnetic field at the transducer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B11/1051" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/1051</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by modulating both the magnetic field and the light beam at the transducers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B11/10513" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10513</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>one of the light beam or the magnetic field being modulated by data and the other by a clock or frequency generator</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B11/10515" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10515</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reproducing </text><reference><text>compensating pit shift <class-ref scheme="cpc">G11B11/1053</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B11/10517" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10517</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Overwriting or erasing </text><reference><text><class-ref scheme="cpc">G11B11/10526</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B11/10519" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10519</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Direct overwriting, i.e. performing erasing and recording using the same transducing means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B11/10521" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10521</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a single light spot</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B11/10523" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10523</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Initialising</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="G11B11/10526" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10526</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bulk initialisation or erasing, e.g. at least one whole information track with a single action</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="G11B11/10528" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10528</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shaping of magnetic domains, e.g. form, dimensions</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="G11B11/1053" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/1053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to compensate for the magnetic domain drift or time shift</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="G11B11/10532" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10532</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heads</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="G11B11/10534" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10534</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording</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="G11B11/10536" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10536</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using thermic beams, e.g. lasers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B11/10539" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10539</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using electromagnetic beams, e.g. polarised light</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="G11B11/10541" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10541</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for reproducing</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="G11B11/10543" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10543</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using optical beam of radiation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B11/10545" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10545</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>interacting directly with the magnetisation on the record carrier</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B11/10547" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10547</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>interacting with the magnetisation of an intermediate transfer element, e.g. magnetic film, included in the head</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B11/1055" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/1055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disposition or mounting of transducers relative to record carriers</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="G11B11/10552" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10552</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base </text><reference><text>for relative movement of transducers <class-ref scheme="cpc">G11B11/10573</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B11/10554" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10554</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the transducers being disposed on the same side of the carrier </text><reference><text>flying heads <class-ref scheme="cpc">G11B11/1058</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B11/10556" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10556</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for moving or switching or masking the transducers in or out of their operative position</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="G11B11/10558" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10558</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in view of the loading or unloading of the carrier</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B11/1056" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/1056</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switching or mechanically reversing the magnetic field generator</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B11/10563" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10563</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Access of indexed parts</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B11/10565" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10565</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Marks for track change, e.g. prepits, gray codes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B11/10567" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10567</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanically moving the transducers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B11/10569" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10569</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Swing arm positioners</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B11/10571" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10571</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sled type positioners</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B11/10573" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10573</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of relative positioning of the magnetic and optical transducers, e.g. to move simultaneously</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="G11B11/10576" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10576</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for moving the transducers for maintaining alignment or spacing relative to the carrier</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="G11B11/10578" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10578</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Servo format, e.g. prepits, guide tracks, pilot signals</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="G11B11/1058" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/1058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Flying heads</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="G11B11/10582" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10582</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Record carriers characterised by the selection of the material or by the structure or form</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="G11B11/10584" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10584</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the form, e.g. comprising mechanical protection elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B11/10586" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10586</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the selection of the material</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B11/10589" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10589</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="13" additional-only="false" sort-key="G11B11/10591" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10591</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for improving write-in properties, e.g. Curie-point temperature</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B11/10593" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10593</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for improving read-out properties, e.g. polarisation of light</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B11/10595" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10595</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of operating function</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="G11B11/10597" definition-exists="false" ipc-concordant="G11B11/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/10597</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adaptations for transducing various formats on the same or different carriers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B11/11" definition-exists="false" ipc-concordant="G11B11/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a beam, </text><CPC-specific-text><text>e.g. of electrons or X-rays</text></CPC-specific-text><text> other than a beam of light </text><CPC-specific-text><text>or a magnetic field</text></CPC-specific-text><text> for recording</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="G11B11/115" definition-exists="false" ipc-concordant="G11B11/115" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/115</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a beam,</text></CPC-specific-text><CPC-specific-text><text>e.g. of electrons or X-rays</text></CPC-specific-text><text> other than a beam of light for reproducing</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="G11B11/12" definition-exists="false" ipc-concordant="G11B11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using recording by optical means </text><reference><text><class-ref scheme="cpc">G11B11/03</class-ref> takes precedence </text><CPC-specific-text><text><class-ref scheme="cpc">G11B11/10</class-ref> takes precedence</text></CPC-specific-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="G11B11/14" definition-exists="false" ipc-concordant="G11B11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with reproducing by magnetic means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B11/16" definition-exists="false" ipc-concordant="G11B11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using recording by mechanical cutting, deforming or pressing </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B11/002</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="G11B11/18" definition-exists="false" ipc-concordant="G11B11/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with reproducing by optical 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="G11B11/20" definition-exists="false" ipc-concordant="G11B11/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with reproducing by magnetic 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="G11B11/22" definition-exists="false" ipc-concordant="G11B11/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with reproducing by capacitive means</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> <u>see</u> provisionally <class-ref scheme="cpc">G11B9/06</class-ref>, <class-ref scheme="cpc">G11B9/07</class-ref>; <class-ref scheme="cpc">G11B11/05</class-ref></note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B11/24" definition-exists="false" ipc-concordant="G11B11/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using recording by near-field interactions</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B11/26" definition-exists="false" ipc-concordant="G11B11/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B11/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using microscopic probe means </text><CPC-specific-text><text>, i.e. recording by means directly associated with the tip of a microscopic electrical probe as used in scanning tunneling microscopy [STM] or atomic force microscopy [AFM] for inducing physical or electrical perturbations in a recording medium </text><reference><text>marking using electrical current <class-ref scheme="cpc">B41M5/20</class-ref>; measuring roughness or irregularity of surfaces <class-ref scheme="cpc">G01B7/34</class-ref>; details of scanning-probe microscopes <class-ref scheme="cpc">G01Q</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11B13/00" definition-exists="true" ipc-concordant="G11B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B13/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recording simultaneously or selectively by methods covered by different main groups </text><CPC-specific-text><text>among <class-ref scheme="cpc">G11B3/00</class-ref>, <class-ref scheme="cpc">G11B5/00</class-ref>, <class-ref scheme="cpc">G11B7/00</class-ref> and <class-ref scheme="cpc">G11B9/00</class-ref></text></CPC-specific-text></title-part><title-part><text>Record carriers therefor </text><CPC-specific-text><text>not otherwise provided for</text></CPC-specific-text></title-part><title-part><text>Reproducing therefrom </text><CPC-specific-text><text>not otherwise provided for </text><reference><text><class-ref scheme="cpc">G11B9/14</class-ref>, <class-ref scheme="cpc">G11B11/002</class-ref> take precedence; driving or moving of heads <class-ref scheme="cpc">G11B3/02</class-ref>, <class-ref scheme="cpc">G11B5/48</class-ref>, <class-ref scheme="cpc">G11B7/08</class-ref>, <class-ref scheme="cpc">G11B21/02</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> This group is limited to the combination of recording and reproducing on the same record carrier by more than one of the different method covered by groups <class-ref scheme="cpc">G11B3/00</class-ref>, <class-ref scheme="cpc">G11B5/00</class-ref>, <class-ref scheme="cpc">G11B7/00</class-ref> and <class-ref scheme="cpc">G11B9/00</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="G11B13/02" definition-exists="false" ipc-concordant="G11B13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B13/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>magnetically and by styli</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="G11B13/04" definition-exists="false" ipc-concordant="G11B13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B13/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>magnetically </text><CPC-specific-text><text>or by magnetisation</text></CPC-specific-text><text> and optically </text><CPC-specific-text><text>or by radiation, for changing or sensing optical properties</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B13/045" definition-exists="false" ipc-concordant="G11B13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B13/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>combined recording by magnetic and optic 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="8" additional-only="false" sort-key="G11B13/06" definition-exists="false" ipc-concordant="G11B13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B13/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>optically and by styli</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="G11B13/08" definition-exists="false" ipc-concordant="G11B13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B13/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using near-field interactions or transducing means and at least one other method or means for recording or reproducing</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="G11B15/00" definition-exists="true" ipc-concordant="G11B15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B15/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Driving, starting or stopping record carriers of filamentary or web form</text></title-part><title-part><text>Driving both such record carriers and heads</text></title-part><title-part><text>Guiding such record carriers or containers therefor</text></title-part><title-part><text>Control thereof</text></title-part><title-part><text>Control of operating function </text><reference><text>driving or guiding heads <class-ref scheme="cpc">G11B3/00</class-ref> - <class-ref scheme="cpc">G11B7/00</class-ref>, <class-ref scheme="cpc">G11B21/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B15/005" definition-exists="false" ipc-concordant="G11B15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Programmed access in sequence to indexed parts of tracks of operating tapes, by driving or guiding the tape </text><reference><text>access by driving of both record carrier and head <class-ref scheme="cpc">G11B15/1816</class-ref>; <u>see</u> prov. also <class-ref scheme="cpc">G11B15/602</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="G11B15/02" definition-exists="false" ipc-concordant="G11B15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of operating function, e.g. switching from recording to reproducing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B15/023" definition-exists="false" ipc-concordant="G11B15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>remotely controlled</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="G11B15/026" definition-exists="false" ipc-concordant="G11B15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using processor, e.g. microcomputer</text></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> <u>see</u> provisional also <class-ref scheme="cpc">G11B15/005</class-ref></note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B15/03" definition-exists="false" ipc-concordant="G11B15/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using counters</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> <u>see</u> prov. also <class-ref scheme="cpc">G11B15/00</class-ref>, <class-ref scheme="cpc">G11B27/00</class-ref></note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B15/04" definition-exists="false" ipc-concordant="G11B15/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Preventing, inhibiting, or warning against accidental erasing or double recording </text><reference><text><class-ref scheme="cpc">G11B15/05</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="G11B15/05" definition-exists="false" ipc-concordant="G11B15/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by sensing features present on or derived from record carrier or container </text><reference><text><class-ref scheme="cpc">G11B15/16</class-ref> takes precedence</text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> <u>see</u> provisional also <class-ref scheme="cpc">G11B15/02</class-ref></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/06" definition-exists="false" ipc-concordant="G11B15/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by sensing auxiliary features on record carriers or containers, e.g. to stop machine near the end of a tape</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/07" definition-exists="false" ipc-concordant="G11B15/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>on containers</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> <u>see</u> provisional also <class-ref scheme="cpc">G11B15/06</class-ref></note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/08" definition-exists="false" ipc-concordant="G11B15/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by photoelectric sensing </text><reference><text><class-ref scheme="cpc">G11B15/07</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="10" additional-only="false" sort-key="G11B15/087" definition-exists="false" ipc-concordant="G11B15/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by sensing recorded signals</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> <u>see</u> provisional also <class-ref scheme="cpc">G11B15/06</class-ref>, <class-ref scheme="cpc">G11B15/02</class-ref>, <class-ref scheme="cpc">G11B27/00</class-ref></note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/093" definition-exists="false" ipc-concordant="G11B15/093" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/093</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by sensing driving condition of record carrier, e.g. travel, tape tension</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> <u>see</u> provisional also <class-ref scheme="cpc">G11B15/16</class-ref>, <class-ref scheme="cpc">G11B15/22</class-ref>, <class-ref scheme="cpc">G11B15/46</class-ref></note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B15/10" definition-exists="false" ipc-concordant="G11B15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manually-operated control</text></title-part><title-part><text>Solenoid-operated control </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B15/44</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/103" definition-exists="false" ipc-concordant="G11B15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>electrically operated</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="G11B15/106" definition-exists="false" ipc-concordant="G11B15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>mechanically operated</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="G11B15/12" definition-exists="false" ipc-concordant="G11B15/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Masking of heads; </text><CPC-specific-text><text>circuits for</text></CPC-specific-text><text> Selecting or switching of heads between operative and inoperative functions </text><CPC-specific-text><text>or between different operative functions or for selection between operative heads</text></CPC-specific-text></title-part><title-part><text>Masking of beams, e.g. of light beams </text><CPC-specific-text><reference><text>track selection by moving the magnetic head <class-ref scheme="cpc">G11B5/54</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/125" definition-exists="false" ipc-concordant="G11B15/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>conditioned by the operating function of the apparatus</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/14" definition-exists="false" ipc-concordant="G11B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Masking or switching periodically, e.g. of rotating heads</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="G11B15/16" definition-exists="false" ipc-concordant="G11B15/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by sensing presence, absence or position of record carrier or container</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/17" definition-exists="false" ipc-concordant="G11B15/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of container</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> <u>see</u> prov. also <class-ref scheme="cpc">G11B15/16</class-ref></note-paragraph></note></notes-and-warnings></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="G11B15/18" definition-exists="false" ipc-concordant="G11B15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B15/18</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Driving</text></title-part><title-part><text>Starting</text></title-part><title-part><text>Stopping</text></title-part><title-part><text>Arrangements for control or regulation thereof </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B15/56</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="G11B15/1808" definition-exists="false" ipc-concordant="G11B15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/1808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Driving of both record carrier and head </text><reference><text><class-ref scheme="cpc">G11B15/467</class-ref> takes precedence; mounting of head <class-ref scheme="cpc">G11B5/52</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="G11B15/1816" definition-exists="false" ipc-concordant="G11B15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/1816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Programmed access in sequence to indexed parts of operating tapes cooperating with rotating heads </text><reference><text><u>see</u> provisional also <class-ref scheme="cpc">G11B15/005</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="10" additional-only="false" sort-key="G11B15/1825" definition-exists="false" ipc-concordant="G11B15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/1825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>driving or moving the head in a direction which cuts across the direction of travel of the tape, e.g. for helicoïdal scanning</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="G11B15/1833" definition-exists="false" ipc-concordant="G11B15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/1833</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with head driven in a plane, cyclically around an axis, e.g. on headwheel </text><reference><text>construction of headwheel <class-ref scheme="cpc">G11B5/53</class-ref>, <class-ref scheme="cpc">G11B21/16</class-ref>; disposition of heads on headwheel <class-ref scheme="cpc">G11B5/531</class-ref>, <class-ref scheme="cpc">G11B21/02</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B15/1841" definition-exists="false" ipc-concordant="G11B15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/1841</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for information tracking by moving the transducing part of the head relative to the headwheel, in the direction of the scanning movement, e.g. for skew or time base correction </text><reference><text>in the direction which cuts across tracks, i.e. for track following <class-ref scheme="cpc">G11B3/38</class-ref>, <class-ref scheme="cpc">G11B5/588</class-ref>, <class-ref scheme="cpc">G11B7/085</class-ref>, <class-ref scheme="cpc">G11B21/08</class-ref>, <class-ref scheme="cpc">G11B21/10</class-ref>; by controlling headwheel rotation <class-ref scheme="cpc">G11B15/4733</class-ref>, by guiding the tape <class-ref scheme="cpc">G11B15/602</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B15/185" definition-exists="false" ipc-concordant="G11B15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using signals recorded in tracks disposed in parallel with the scanning direction</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B15/1858" definition-exists="false" ipc-concordant="G11B15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/1858</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using auxiliary signals, i.e. pilot signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B15/1866" definition-exists="false" ipc-concordant="G11B15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/1866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>superimposed on the main signal track</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/1875" definition-exists="false" ipc-concordant="G11B15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/1875</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adaptations for special effects or editing </text><reference><text>signal processing or indexing therefor <class-ref scheme="cpc">G11B27/00</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="G11B15/1883" definition-exists="false" ipc-concordant="G11B15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/1883</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for record carriers inside containers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/1891" definition-exists="false" ipc-concordant="G11B15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/1891</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the record carrier being endless</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="G11B15/20" definition-exists="false" ipc-concordant="G11B15/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Moving record carrier backwards or forwards by finite amounts, i.e. backspacing, forward spacing</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="G11B15/22" definition-exists="false" ipc-concordant="G11B15/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B15/22</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Stopping means </text><reference><CPC-specific-text><text><class-ref scheme="cpc">G11B15/06</class-ref> takes precedence;</text></CPC-specific-text><text> slowing-down preparatory to stopping or speed-changing <class-ref scheme="cpc">G11B15/48</class-ref>; speed-controlling by mechanical linkage <class-ref scheme="cpc">G11B15/50</class-ref> </text><CPC-specific-text><text>; inside container <class-ref scheme="cpc">G11B23/04</class-ref></text></CPC-specific-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="G11B15/24" definition-exists="false" ipc-concordant="G11B15/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Drive disengaging 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="G11B15/26" definition-exists="false" ipc-concordant="G11B15/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B15/26</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Driving record carriers by members acting directly or indirectly thereon </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B15/44</class-ref> takes precedence; driving features inside container, <u>see</u> <class-ref scheme="cpc">G11B23/04</class-ref> and subgroups</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="G11B15/28" definition-exists="false" ipc-concordant="G11B15/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>through rollers driving by frictional contact with the record carrier, e.g. capstan</text></title-part><title-part><text>Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive</text></title-part><title-part><text>Multiple capstan systems alternately engageable with record carrier to provide reversal</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/285" definition-exists="false" ipc-concordant="G11B15/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>through pneumatic means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/29" definition-exists="false" ipc-concordant="G11B15/29" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/29</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>through pinch-rollers </text><CPC-specific-text><text>or tape rolls</text></CPC-specific-text><reference><text><class-ref scheme="cpc">G11B15/295</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/295" definition-exists="false" ipc-concordant="G11B15/295" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/295</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with single capstan or drum simultaneously driving the record carrier at two separate points of an isolated part thereof, e.g. the capstan acting directly on the tape rollers</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="G11B15/30" definition-exists="false" ipc-concordant="G11B15/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>through the means for supporting the record carrier, e.g. mandrel, turntable</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="G11B15/32" definition-exists="false" ipc-concordant="G11B15/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>through the reels or cores on to which the record carrier is wound</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="G11B15/34" definition-exists="false" ipc-concordant="G11B15/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>G11B15/34</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>through non-slip drive means, e.g. sprocket</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="G11B15/38" definition-exists="false" ipc-concordant="G11B15/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Driving record carriers by pneumatic means </text><CPC-specific-text><reference><text>pneumatic control for capstans driving the record carrier by frictional contact <class-ref scheme="cpc">G11B15/285</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="G11B15/385" definition-exists="false" ipc-concordant="G11B15/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/385</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>directly, e.g. by rotating drum </text><reference><text>guiding record carrier on rotating drum <class-ref scheme="cpc">G11B15/61</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="G11B15/40" definition-exists="false" ipc-concordant="G11B15/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Driving record carriers otherwise than by electric motor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/42" definition-exists="false" ipc-concordant="G11B15/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>manually</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="G11B15/43" definition-exists="false" ipc-concordant="G11B15/43" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B15/43</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Control or regulation of mechanical tension of record carrier, e.g. tape tension</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="G11B15/44" definition-exists="false" ipc-concordant="G11B15/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Speed-changing arrangements</text></title-part><title-part><text>Reversing arrangements</text></title-part><title-part><text>Drive transfer means therefor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/442" definition-exists="false" ipc-concordant="G11B15/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/442</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control thereof</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="G11B15/444" definition-exists="false" ipc-concordant="G11B15/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/444</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>reversing arrangements </text><reference><text><class-ref scheme="cpc">G11B15/442</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="G11B15/446" definition-exists="false" ipc-concordant="G11B15/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by driving the reels only</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="G11B15/448" definition-exists="false" ipc-concordant="G11B15/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/448</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>automatic reverse drive transfer therefor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B15/46" definition-exists="false" ipc-concordant="G11B15/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Controlling, regulating, or indicating speed </text><CPC-specific-text><reference><text>dependent on position of tape in reserve, loop <class-ref scheme="cpc">G11B15/56</class-ref>, <class-ref scheme="cpc">G11B15/58</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="G11B15/463" definition-exists="false" ipc-concordant="G11B15/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using pilot tracking tones embedded in binary coded signals, e.g. using DSV/CDS values of coded signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/467" definition-exists="false" ipc-concordant="G11B15/467" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/467</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in arrangements for recording or reproducing wherein both record carriers and heads are driven </text><CPC-specific-text><reference><text><u>see</u> provisional also <class-ref scheme="cpc">G11B15/1808</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="G11B15/4671" definition-exists="false" ipc-concordant="G11B15/467" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/4671</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by controlling simultaneously the speed of the tape and the speed of the rotating head</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="G11B15/4672" definition-exists="false" ipc-concordant="G11B15/467" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/4672</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for information tracking</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="G11B15/4673" definition-exists="false" ipc-concordant="G11B15/467" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/4673</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by controlling the speed of the tape while the head is rotating</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="G11B15/4675" definition-exists="false" ipc-concordant="G11B15/467" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/4675</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for information tracking</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B15/4676" definition-exists="false" ipc-concordant="G11B15/467" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/4676</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using signals recorded in tracks disposed in parallel with the scanning direction</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B15/4677" definition-exists="false" ipc-concordant="G11B15/467" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/4677</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using auxiliary signals, i.e. pilot signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B15/4678" definition-exists="false" ipc-concordant="G11B15/467" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/4678</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>superimposed on the main signal track</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="11" additional-only="false" sort-key="G11B15/473" definition-exists="false" ipc-concordant="G11B15/473" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/473</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by controlling the speed of the heads</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> <u>see</u> prov. also <class-ref scheme="cpc">G11B5/588</class-ref></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B15/4731" definition-exists="false" ipc-concordant="G11B15/473" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/4731</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>control of headwheel rotation </text><reference><text>disposition or construction of headwheel motor <class-ref scheme="cpc">G11B5/53</class-ref>, <class-ref scheme="cpc">G11B21/02</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B15/4733" definition-exists="false" ipc-concordant="G11B15/473" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/4733</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for information tracking, e.g. for time base correction</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B15/4735" definition-exists="false" ipc-concordant="G11B15/473" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/4735</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using signals recorded in tracks disposed parallel with the scanning direction</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G11B15/4736" definition-exists="false" ipc-concordant="G11B15/473" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/4736</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using auxiliary signals, i.e. pilot signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="G11B15/4738" definition-exists="false" ipc-concordant="G11B15/473" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/4738</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>superimposed on the main signal track</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/48" definition-exists="false" ipc-concordant="G11B15/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Starting</text></title-part><title-part><text>Accelerating</text></title-part><title-part><text>Decelerating</text></title-part><title-part><text>Arrangements preventing malfunction during drive change</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="G11B15/50" definition-exists="false" ipc-concordant="G11B15/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by mechanical linkage, e.g. clutch</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="G11B15/52" definition-exists="false" ipc-concordant="G11B15/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using signals recorded on, or derived from, record carrier</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="G11B15/54" definition-exists="false" ipc-concordant="G11B15/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B15/54</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>by stroboscope</text></title-part><title-part><text>by tachometer</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B15/56" definition-exists="false" ipc-concordant="G11B15/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the record carrier having reserve loop, e.g. to minimise inertia during acceleration </text><CPC-specific-text><text>measuring or control in connection therewith</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B15/58" definition-exists="false" ipc-concordant="G11B15/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with vacuum column</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="G11B15/60" definition-exists="false" ipc-concordant="G11B15/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Guiding record carrier </text><reference><text>guiding devices structurally associated with magazines or cassettes <class-ref scheme="cpc">G11B23/04</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="G11B15/602" definition-exists="false" ipc-concordant="G11B15/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/602</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for track selection, acquisition or following</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="G11B15/605" definition-exists="false" ipc-concordant="G11B15/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>without displacing the guiding means</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="G11B15/607" definition-exists="false" ipc-concordant="G11B15/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/607</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pneumatic guiding</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="G11B15/61" definition-exists="false" ipc-concordant="G11B15/61" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/61</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>on drum, e.g. drum containing rotating heads </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B15/66</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/615" definition-exists="false" ipc-concordant="G11B15/61" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/615</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>inside container</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="G11B15/62" definition-exists="false" ipc-concordant="G11B15/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Maintaining desired spacing between record carrier and head</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/64" definition-exists="false" ipc-concordant="G11B15/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by fluid-dynamic spacing</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="G11B15/66" definition-exists="false" ipc-concordant="G11B15/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Threading</text></title-part><title-part><text>Loading</text></title-part><title-part><text>Automatic self-loading</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/662" definition-exists="false" ipc-concordant="G11B15/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/662</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Positioning or locking of spool or reel</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="G11B15/665" definition-exists="false" ipc-concordant="G11B15/665" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/665</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by extracting loop of record carrier from container</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/6651" definition-exists="false" ipc-concordant="G11B15/665" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6651</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to pull the record carrier against non rotating heads</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="G11B15/6653" definition-exists="false" ipc-concordant="G11B15/665" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6653</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to pull the record carrier against drum</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="G11B15/6655" definition-exists="false" ipc-concordant="G11B15/665" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6655</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using one loading ring, i.e. "C-type" </text><reference><text><class-ref scheme="cpc">G11B15/6658</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B15/6656" definition-exists="false" ipc-concordant="G11B15/665" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6656</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using two-sided extraction, i.e. "M-type"</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B15/6658" definition-exists="false" ipc-concordant="G11B15/665" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6658</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with two loading rings rotating in opposite directions</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/67" definition-exists="false" ipc-concordant="G11B15/67" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by extracting end of record carrier from container or spool</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/671" definition-exists="false" ipc-concordant="G11B15/67" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/671</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pneumatic means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/672" definition-exists="false" ipc-concordant="G11B15/67" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/672</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Extracting end of record carrier from container or single reel </text><reference><text><class-ref scheme="cpc">G11B15/671</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/673" definition-exists="false" ipc-concordant="G11B15/67" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/673</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Threading end of record carrier externally to single reel </text><reference><text><class-ref scheme="cpc">G11B15/671</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/674" definition-exists="false" ipc-concordant="G11B15/67" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/674</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Threading or attaching end of record carrier on or to single reel </text><reference><text><class-ref scheme="cpc">G11B15/671</class-ref> takes precedence</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="G11B15/675" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B15/675</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Guiding containers </text><CPC-specific-text><text>, e.g. loading, ejecting cassettes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B15/67502" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67502</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="G11B15/67505" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67505</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Servo control</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/67507" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67507</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ejection damping 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="9" additional-only="false" sort-key="G11B15/6751" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6751</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with movement of the cassette parallel to its main side, i.e. front loading </text><reference><text><class-ref scheme="cpc">G11B15/67544</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B15/67513" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67513</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and movement of driving elements perpendicular thereto</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="G11B15/67515" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67515</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with servo control</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="G11B15/67518" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67518</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ejection damping 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="G11B15/67521" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67521</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of cassette with internal belt drive</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="G11B15/67523" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67523</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with servo control</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="G11B15/67526" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67526</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ejection damping 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="G11B15/67528" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67528</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of endless tape cassette</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="G11B15/67531" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67531</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with servo control</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="G11B15/67534" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67534</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ejection damping 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="G11B15/67536" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67536</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of cassette inside drawer</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="G11B15/67539" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67539</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with servo control</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="G11B15/67542" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67542</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ejection damping means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B15/67544" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67544</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with movement of the cassette parallel to its main side and subsequent movement perpendicular thereto, i.e. front loading</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="G11B15/67547" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67547</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the two movements being made by the cassette holder</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/67549" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67549</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with servo control</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="G11B15/67552" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67552</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ejection damping 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="G11B15/67555" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67555</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the second movement only being made by the cassette holder</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/67557" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67557</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with servo control</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="G11B15/6756" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6756</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ejection damping means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B15/67563" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67563</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with movement of the cassette perpendicular to its main side, i.e. top loading</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="G11B15/67565" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67565</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the cassette with holder</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/67568" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67568</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with servo control</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="G11B15/67571" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67571</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ejection damping 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="G11B15/67573" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67573</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the cassette without holder</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/67576" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67576</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with servo control</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="G11B15/67578" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67578</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ejection damping means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B15/67581" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67581</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with pivoting movement of the cassette holder</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="G11B15/67584" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67584</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>outside the apparatus</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/67586" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67586</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with servo control</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="G11B15/67589" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67589</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ejection damping 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="G11B15/67592" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67592</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>inside the apparatus</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/67594" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67594</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with servo control</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="G11B15/67597" definition-exists="false" ipc-concordant="G11B15/675" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/67597</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ejection damping means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B15/68" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Automatic cassette changing arrangements; </text><CPC-specific-text><text>automatic tape changing arrangements</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="G11B15/6805" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6805</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with linearly moving rectangular box shaped magazines</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="G11B15/681" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/681</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in vertical direction</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="G11B15/6815" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6815</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in horizontal direction</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="G11B15/682" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/682</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with fixed magazines having fixed cassette storage cells, e.g. in racks</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="G11B15/6825" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of magazines, e.g. removable, adapted for cassettes of different sizes</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="G11B15/683" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/683</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the recorder or player is moved according to the location of a selected cassette </text><reference><text><class-ref scheme="cpc">G11B15/684</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B15/6835" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6835</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the cassettes being transferred to a fixed recorder or player using a moving carriage</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="G11B15/684" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/684</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the cassettes having a storage position inside the magazine and a slightly shifted active position, e.g. by solenoid</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="G11B15/6845" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6845</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with rotatable magazine</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="G11B15/685" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the cassettes being arranged in a single level</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="G11B15/6855" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6855</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the recorder or player is moved towards a selected cassette in the magazine</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B15/686" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/686</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a fixed recorder or player in the centre or at the periphery of the magazine</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B15/6865" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6865</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a fixed recorder or player under the magazine</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="G11B15/687" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/687</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the cassettes being arranged in multiple levels</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="G11B15/6875" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6875</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the recorder or player is moved towards a selected cassette in the magazine</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B15/688" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/688</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the cassettes being transferred to a fixed recorder or player using a moving carriage</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="G11B15/6885" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6885</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the cassettes being conveyed within a cassette storage location, e.g. within a storage bin or conveying by belt</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="G11B15/689" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/689</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of the cassette changing arrangement</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="G11B15/6895" definition-exists="false" ipc-concordant="G11B15/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B15/6895</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Automatic tape changing arrangements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B15/70" definition-exists="false" ipc-concordant="G11B15/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B15/70</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>the record carrier being an endless loop record carrier </text><CPC-specific-text><reference><text>inside container <class-ref scheme="cpc">G11B15/1891</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11B17/00" definition-exists="true" ipc-concordant="G11B17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Guiding record carriers not specifically of filamentary or web form, or of supports therefor </text><reference><text>guiding cards or sheets <class-ref scheme="cpc">G06K13/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B17/005" definition-exists="false" ipc-concordant="G11B17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Programmed access to indexed parts of tracks of operating discs, by guiding the disc</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="G11B17/02" definition-exists="false" ipc-concordant="G11B17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/02</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="G11B17/021" definition-exists="false" ipc-concordant="G11B17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Selecting or spacing of record carriers for introducing the heads</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="G11B17/022" definition-exists="false" ipc-concordant="G11B17/022" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Positioning or locking of single discs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B17/025" definition-exists="false" ipc-concordant="G11B17/025" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of discs which are stationary during transducing operation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B17/0255" definition-exists="false" ipc-concordant="G11B17/025" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>flexible discs</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="G11B17/028" definition-exists="false" ipc-concordant="G11B17/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of discs rotating during transducing operation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B17/0281" definition-exists="false" ipc-concordant="G11B17/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0281</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by an adapter enabling the centre-pin to receive carriers with large centre hole</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="G11B17/0282" definition-exists="false" ipc-concordant="G11B17/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means provided on the turntable</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="G11B17/0283" definition-exists="false" ipc-concordant="G11B17/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Two or more turntables</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="G11B17/0284" definition-exists="false" ipc-concordant="G11B17/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by clampers</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="G11B17/0285" definition-exists="false" ipc-concordant="G11B17/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>mounted on a bridge</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B17/0286" definition-exists="false" ipc-concordant="G11B17/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>mounted on a pivotal lever</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="G11B17/0287" definition-exists="false" ipc-concordant="G11B17/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0287</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by permanent connections, e.g. screws, rivets</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="G11B17/0288" definition-exists="false" ipc-concordant="G11B17/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means for moving the turntable or the clamper towards the disk</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="G11B17/03" definition-exists="false" ipc-concordant="G11B17/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in containers or trays </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B17/032</class-ref>, <class-ref scheme="cpc">G11B17/035</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B17/032" definition-exists="false" ipc-concordant="G11B17/032" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/032</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Positioning by moving the door or the cover </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B17/035</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B17/035" definition-exists="false" ipc-concordant="G11B17/035" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/035</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Positioning by moving the loading station</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="G11B17/038" definition-exists="false" ipc-concordant="G11B17/038" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/038</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Centering or locking of a plurality of discs in a single cartridge</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="G11B17/04" definition-exists="false" ipc-concordant="G11B17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Feeding or guiding single record carrier to or from transducer unit </text><CPC-specific-text><reference><text>guiding during transducing operation <class-ref scheme="cpc">G11B17/34</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B17/0401" definition-exists="false" ipc-concordant="G11B17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0401</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="11" additional-only="false" sort-key="G11B17/0402" definition-exists="false" ipc-concordant="G11B17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0402</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Servo control</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="G11B17/0404" definition-exists="false" ipc-concordant="G11B17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0404</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with parallel drive rollers</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="G11B17/0405" definition-exists="false" ipc-concordant="G11B17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Closing mechanism, e.g. door</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="G11B17/0407" definition-exists="false" ipc-concordant="G11B17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlling the loading of the record carrier</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="G11B17/0408" definition-exists="false" ipc-concordant="G11B17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0408</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of non-disc record carrier, e.g. card</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="G11B17/041" definition-exists="false" ipc-concordant="G11B17/041" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for discs contained within cartridges</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B17/043" definition-exists="false" ipc-concordant="G11B17/043" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Direct insertion, i.e. without external loading means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B17/0432" definition-exists="false" ipc-concordant="G11B17/043" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0432</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for discs of different sizes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B17/0434" definition-exists="false" ipc-concordant="G11B17/043" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0434</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with mechanism for subsequent vertical movement of the disc </text><reference><text><class-ref scheme="cpc">G11B17/0438</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B17/0436" definition-exists="false" ipc-concordant="G11B17/043" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0436</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with opening mechanism of the cartridge shutter </text><reference><text><class-ref scheme="cpc">G11B17/0438</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B17/0438" definition-exists="false" ipc-concordant="G11B17/043" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0438</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with mechanism for subsequent vertical movement of the disc and opening mechanism of the cartridge shutter</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="G11B17/044" definition-exists="false" ipc-concordant="G11B17/044" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indirect insertion, i.e. with external loading means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B17/046" definition-exists="false" ipc-concordant="G11B17/046" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with pivoting loading means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B17/0463" definition-exists="false" ipc-concordant="G11B17/046" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for discs of different sizes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B17/0466" definition-exists="false" ipc-concordant="G11B17/046" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with opening mechanism of the cartridge shutter</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B17/047" definition-exists="false" ipc-concordant="G11B17/047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with sliding loading means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B17/0473" definition-exists="false" ipc-concordant="G11B17/047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0473</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for discs of different sizes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B17/0476" definition-exists="false" ipc-concordant="G11B17/047" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0476</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with opening mechanism of the cartridge shutter</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B17/049" definition-exists="false" ipc-concordant="G11B17/049" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/049</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Insertion of discs having to be extracted from the cartridge prior to recording or reproducing</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="G11B17/05" definition-exists="false" ipc-concordant="G11B17/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/05</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for discs not contained within cartridges</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B17/051" definition-exists="false" ipc-concordant="G11B17/051" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/051</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Direct insertion, i.e. without external loading means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B17/0515" definition-exists="false" ipc-concordant="G11B17/051" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0515</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for discs of different sizes</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="G11B17/053" definition-exists="false" ipc-concordant="G11B17/053" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/053</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indirect insertion, i.e. with external loading means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B17/054" definition-exists="false" ipc-concordant="G11B17/054" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/054</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with pivoting loading means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B17/0545" definition-exists="false" ipc-concordant="G11B17/054" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0545</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for discs of different sizes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B17/056" definition-exists="false" ipc-concordant="G11B17/056" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/056</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with sliding loading means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B17/0565" definition-exists="false" ipc-concordant="G11B17/056" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/0565</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for discs of different sizes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B17/057" definition-exists="false" ipc-concordant="G11B17/057" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/057</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for handling both discs contained within cartridges and discs not contained within cartridges</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B17/08" definition-exists="false" ipc-concordant="G11B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>from consecutive-access magazine of disc records</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B17/10" definition-exists="false" ipc-concordant="G11B17/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with horizontal transfer to the turntable from a stack arranged with a vertical axis</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="G11B17/12" definition-exists="false" ipc-concordant="G11B17/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with axial transfer to the turntable from a stack with a vertical axis</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B17/14" definition-exists="false" ipc-concordant="G11B17/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by mechanism in rotating centre post, e.g. permitting the playing of both sides of a record</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="G11B17/16" definition-exists="false" ipc-concordant="G11B17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by mechanism in stationary centre post, e.g. with stepped post, using fingers on post</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B17/162" definition-exists="false" ipc-concordant="G11B17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/162</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for detecting the diameter of the record</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="G11B17/165" definition-exists="false" ipc-concordant="G11B17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with mechanical detecting means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B17/167" definition-exists="false" ipc-concordant="G11B17/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/167</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with optical detecting means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B17/18" definition-exists="false" ipc-concordant="G11B17/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by mechanism operating on the edge of the disc record</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="G11B17/20" definition-exists="false" ipc-concordant="G11B17/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with transfer away from stack on turntable after playing</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="G11B17/22" definition-exists="false" ipc-concordant="G11B17/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>from random access magazine of disc records</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B17/221" definition-exists="false" ipc-concordant="G11B17/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B17/221</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>with movable magazine </text><reference><text><class-ref scheme="cpc">G11B17/24</class-ref> - <class-ref scheme="cpc">G11B17/28</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B17/223" definition-exists="false" ipc-concordant="G11B17/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/223</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a vertical direction</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="G11B17/225" definition-exists="false" ipc-concordant="G11B17/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the disks are transferred from a fixed magazine to a fixed playing unit using a moving carriage</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="G11B17/226" definition-exists="false" ipc-concordant="G11B17/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the magazine consisting of a single rotatable tray carrying the disks</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="G11B17/228" definition-exists="false" ipc-concordant="G11B17/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control systems for magazines </text><reference><text><class-ref scheme="cpc">G11B17/225</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="G11B17/24" definition-exists="false" ipc-concordant="G11B17/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B17/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the magazine having a toroidal or part-toroidal shape</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Group <class-ref scheme="cpc">G11B17/30</class-ref> takes precedence over groups <class-ref scheme="cpc">G11B17/24</class-ref> - <class-ref scheme="cpc">G11B17/28</class-ref>. </note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B17/26" definition-exists="false" ipc-concordant="G11B17/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the magazine having a cylindrical shape with vertical axis</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="G11B17/28" definition-exists="false" ipc-concordant="G11B17/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the magazine having a cylindrical shape with horizontal axis</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="G11B17/30" definition-exists="false" ipc-concordant="G11B17/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the playing unit is moved according to the location of the selected record</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="G11B17/32" definition-exists="false" ipc-concordant="G11B17/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Maintaining desired spacing between record carrier and head, e.g. by fluid-dynamic spacing </text><CPC-specific-text><reference><text>damping of vibrations of record carriers on turntables by fluid-dynamic means <class-ref scheme="cpc">G11B19/2018</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="G11B17/34" definition-exists="false" ipc-concordant="G11B17/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B17/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Guiding record carriers during transducing operation, e.g. for track following </text><reference><text><class-ref scheme="cpc">G11B17/32</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11B19/00" definition-exists="true" ipc-concordant="G11B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B19/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor</text></title-part><title-part><text>Control thereof</text></title-part><title-part><text>Control of operating function </text><CPC-specific-text><text>; Driving both disc and head</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B19/02" definition-exists="false" ipc-concordant="G11B19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of operating function, e.g. switching from recording to reproducing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B19/022" definition-exists="false" ipc-concordant="G11B19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control panels</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="G11B19/025" definition-exists="false" ipc-concordant="G11B19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>'Virtual' control panels, e.g. Graphical User Interface [GUI]</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="G11B19/027" definition-exists="false" ipc-concordant="G11B19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Remotely controlled </text><reference><text>remote control systems in general <class-ref scheme="cpc">G08C</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="G11B19/04" definition-exists="false" ipc-concordant="G11B19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B19/041" definition-exists="false" ipc-concordant="G11B19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detection or prevention of read or write errors</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="G11B19/042" definition-exists="false" ipc-concordant="G11B19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>due to external shock or vibration</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="G11B19/043" definition-exists="false" ipc-concordant="G11B19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by detecting a free-fall condition</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="G11B19/044" definition-exists="false" ipc-concordant="G11B19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using a data buffer</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="G11B19/045" definition-exists="false" ipc-concordant="G11B19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by detecting mistracking</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="G11B19/046" definition-exists="false" ipc-concordant="G11B19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Detection or prevention or problems due to temperature</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="G11B19/047" definition-exists="false" ipc-concordant="G11B19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Recovery from power failure</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="G11B19/048" definition-exists="false" ipc-concordant="G11B19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-01-01" status="published"><classification-symbol>G11B19/048</classification-symbol><class-title date-revised="2017-01-01"><title-part><CPC-specific-text><text>Testing of disk drives, e.g. to detect defects or prevent sudden failure</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="G11B19/06" definition-exists="false" ipc-concordant="G11B19/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by counting or timing of machine operations</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="G11B19/08" definition-exists="false" ipc-concordant="G11B19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using devices external to the driving mechanisms, e.g. coin-freed switch </text><reference><text>coin actuated mechanisms <class-ref scheme="cpc">G07F5/00</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="G11B19/10" definition-exists="false" ipc-concordant="G11B19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by sensing presence or absence of record in accessible stored position or on turntable</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="G11B19/12" definition-exists="false" ipc-concordant="G11B19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by sensing distinguishing features of </text><CPC-specific-text><text>or on</text></CPC-specific-text><text> records, e.g. diameter </text><CPC-specific-text><text>end mark</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="G11B19/121" definition-exists="false" ipc-concordant="G11B19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2019/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by photo-electric sensing</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="G11B19/122" definition-exists="false" ipc-concordant="G11B19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving the detection of an identification or authentication mark </text><reference><text>record carriers indicating unauthorised or prior use <class-ref scheme="cpc">G11B23/28</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="G11B19/124" definition-exists="false" ipc-concordant="G11B19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/124</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving the detection of diameter of disks </text><reference><text>feeding or guiding of a single record carrier <class-ref scheme="cpc">G11B17/04</class-ref> and subgroups</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="G11B19/125" definition-exists="false" ipc-concordant="G11B19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving the detection of carrier data format</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="G11B19/127" definition-exists="false" ipc-concordant="G11B19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving detection of the number of sides, e.g. single or double, or layers, e.g. for multiple recording or reproducing layers</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="G11B19/128" definition-exists="false" ipc-concordant="G11B19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/128</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving the detection of track pitch or recording density</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="G11B19/14" definition-exists="false" ipc-concordant="G11B19/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by sensing movement or position of head, e.g. means moving in correspondence with head movements</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="G11B19/16" definition-exists="false" ipc-concordant="G11B19/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manual control</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B19/165" definition-exists="false" ipc-concordant="G11B19/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by closing the cover</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="G11B19/18" definition-exists="false" ipc-concordant="G11B19/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Manual action on one element producing control effect indirectly by consequent action of driving mechanism</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B19/20" definition-exists="false" ipc-concordant="G11B19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Driving</text></title-part><title-part><text>Starting</text></title-part><title-part><text>Stopping</text></title-part><title-part><text>Control thereof</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B19/2009" definition-exists="false" ipc-concordant="G11B19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/2009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Turntables, hubs and motors for disk drives; Mounting of motors in the drive </text><reference><text>means for clamping of disk to turntable <class-ref scheme="cpc">G11B17/022</class-ref> and subgroups</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="G11B19/2018" definition-exists="false" ipc-concordant="G11B19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/2018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Incorporating means for passive damping of vibration, either in the turntable, motor or mounting</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="G11B19/2027" definition-exists="false" ipc-concordant="G11B19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/2027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Turntables or rotors incorporating balancing means; Means for detecting imbalance</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="G11B19/2036" definition-exists="false" ipc-concordant="G11B19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/2036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Motors characterized by fluid-dynamic bearings</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="G11B19/2045" definition-exists="false" ipc-concordant="G11B19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/2045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hubs</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="G11B19/2054" definition-exists="false" ipc-concordant="G11B19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/2054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spindle motor power-up sequences</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="G11B19/2063" definition-exists="false" ipc-concordant="G11B19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/2063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Spindle motor power-down sequences</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="G11B19/2072" definition-exists="false" ipc-concordant="G11B19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/2072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for the reduction of power consumption during idle time</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B19/2081" definition-exists="false" ipc-concordant="G11B19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/2081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>emergency power-down</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="G11B19/209" definition-exists="false" ipc-concordant="G11B19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in multiple disk arrays, e.g. spindle synchronisation in RAID 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="G11B19/22" definition-exists="false" ipc-concordant="G11B19/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B19/22</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Brakes other than speed-regulating brakes</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="G11B19/24" definition-exists="false" ipc-concordant="G11B19/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements for providing constant relative speed between record carrier and head</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B19/247" definition-exists="false" ipc-concordant="G11B19/247" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/247</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electrical means</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="G11B19/253" definition-exists="false" ipc-concordant="G11B19/253" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/253</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using mechanical means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B19/26" definition-exists="false" ipc-concordant="G11B19/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Speed-changing arrangements</text></title-part><title-part><text>Reversing arrangements</text></title-part><title-part><text>Drive-transfer means therefor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B19/265" definition-exists="false" ipc-concordant="G11B19/265" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Friction wheel drive</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="G11B19/27" definition-exists="false" ipc-concordant="G11B19/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/27</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Belt drive</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="G11B19/275" definition-exists="false" ipc-concordant="G11B19/275" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B19/275</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gear wheel drive</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="G11B19/28" definition-exists="false" ipc-concordant="G11B19/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B19/28</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Speed controlling, regulating, or indicating </text><reference><text><class-ref scheme="cpc">G11B19/24</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11B20/00" definition-exists="true" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Signal processing not specific to the method of recording or reproducing</text></title-part><title-part><text>Circuits therefor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B20/00007" definition-exists="true" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-11-01" status="published"><classification-symbol>G11B20/00007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time or data compression or expansion </text><reference><text>audio compression based on psychoacoustics <class-ref scheme="cpc">G10L19/00</class-ref>; data processing for reproducing audio data at different playback speeds <class-ref scheme="cpc">G10L21/04</class-ref>; video compression <class-ref scheme="cpc">H04N19/00</class-ref>; data compression <u>per se</u> <class-ref scheme="cpc">H03M7/30</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B20/00014" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/00014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the compressed signal being an audio signal</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="G11B20/00021" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/00021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>lossless audio compression</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="G11B20/00028" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/00028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Advanced audio coding [AAC]</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="G11B20/00036" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/00036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>AC-3, i.e. ATSC digital audio compression standard</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="G11B20/00043" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/00043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adaptive transform acoustic coding [ATRAC]</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="G11B20/0005" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/0005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>DTS audio codecs</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="G11B20/00057" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/00057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>MPEG-1 or MPEG-2 audio layer III [MP3]</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="G11B20/00065" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/00065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sigma-delta audio encoding</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B20/00072" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/00072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the compressed signal including a video signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B20/00079" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/00079</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the compression ratio or quality level being adapted to circumstances, e.g. to the available recording space</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="G11B20/00086" definition-exists="true" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits for prevention of unauthorised reproduction or copying, e.g. piracy </text><reference><text>indicating unauthorised use of record carriers in general <class-ref scheme="cpc">G11B23/28</class-ref>; scrambling for television signal recording <class-ref scheme="cpc">H04N5/913</class-ref>; network architectures or network protocols for network security <class-ref scheme="cpc">H04L63/00</class-ref>; cryptographic mechanisms or cryptographic arrangements for secret or secure communication <class-ref scheme="cpc">H04L9/00</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="G11B20/00094" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00094</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving measures which result in a restriction to authorised record carriers</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="G11B20/00101" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00101</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the original record carrier having a larger recording capacity than the potential target medium</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="G11B20/00108" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein original, non-rewritable record carriers are recognised by trying to erase recorded data</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="G11B20/00115" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00115</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the record carrier stores a unique medium identifier</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="G11B20/00123" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the record carrier being identified by recognising some of its unique characteristics, e.g. a unique defect pattern serving as a physical signature of the record carrier</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="G11B20/0013" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/0013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the measure concerns not the entire record carrier, but a specific physical or logical area of one or more record carriers</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="G11B20/00137" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00137</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving measures which result in a restriction to contents recorded on or reproduced from a record carrier to authorised users</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="G11B20/00144" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00144</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a user identifier, e.g. a unique customer ID</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="G11B20/00152" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00152</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a password</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="G11B20/00159" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00159</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Parental control systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B20/00166" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00166</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving measures which result in a restriction to authorised contents recorded on or reproduced from a record carrier, e.g. music or software</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="G11B20/00173" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00173</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the origin of the content is checked, e.g. determining whether the content has originally been retrieved from a legal disc copy or another trusted 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="G11B20/00181" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00181</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a content identifier, e.g. an international standard recording code [ISRC] or a digital object identifier [DOI]</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="G11B20/00188" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00188</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier</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="G11B20/00195" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00195</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a device identifier associated with the player or recorder, e.g. serial numbers of playback apparatuses or MAC addresses</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="G11B20/00202" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the copy protection scheme builds on multi-session recording, e.g. defective table of contents [TOC] in the 2nd session</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="G11B20/0021" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving encryption or decryption of contents recorded on or reproduced from a record carrier</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="G11B20/00217" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00217</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source </text><reference><text>key distribution or management <class-ref scheme="cpc">H04L9/08</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B20/00224" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00224</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the key is obtained from a remote server</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="G11B20/00231" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00231</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the key is obtained from a local external medium, e.g. a card</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="G11B20/00239" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00239</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the key is provided by a software application accessing the medium</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="G11B20/00246" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00246</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the key is obtained from a local device, e.g. device key initially stored by the player or by the recorder</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="G11B20/00253" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00253</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the key is stored on the record carrier</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="G11B20/0026" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/0026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored as a barcode</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B20/00268" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>said barcode being recorded in a burst cutting area [BCA]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00275" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored on a chip attached to the record carrier</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00282" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored in the content area, e.g. program area, data area or user area </text><reference><text>key stored in a management area <class-ref scheme="cpc">G11B20/00297</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B20/00289" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00289</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the key is stored as a watermark</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00297" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00297</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored in a management area, e.g. the video manager [VMG] of a DVD</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B20/00304" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00304</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored in the lead-in area [LIA]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B20/00311" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00311</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored in the lead-out area [LOA]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B20/00318" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00318</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored in the TOC</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00326" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00326</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being embossed on the record carrier</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00333" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00333</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored in header data, e.g. in sector headers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/0034" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/0034</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored as a hologram</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00347" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00347</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the medium identifier is used as a key</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00355" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00355</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the record carrier having a label that provides the key</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00362" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00362</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being obtained from a media key block [MKB]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00369" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00369</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a first key, which is usually stored on a hidden channel, e.g. in the lead-in of a BD-R, unlocks a key locker containing a second</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00376" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00376</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored by varying the pit format, e.g. depth, width, length or edge positions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00384" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00384</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being derived from a physical signature of the record carrier, e.g. unique feature set</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00391" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00391</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored in subcodes, e.g. in the Q subcode of a CD</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00398" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00398</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored in sync patterns</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00405" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the key being stored by varying characteristics of the recording track, e.g. by altering the track pitch or by modulating the wobble track</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B20/00413" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00413</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the key is input by a user</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="G11B20/0042" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the copy protection scheme being related to a specific access protection standard</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="G11B20/00427" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>advanced access content system [AACS]</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="G11B20/00434" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00434</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>content protection for pre-recorded media [CPPM]</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="G11B20/00442" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00442</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>content protection for recordable media [CPRM]</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="G11B20/00449" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00449</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>content scrambling system [CSS]</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="G11B20/00456" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00456</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>digital transmission content protection [DTCP]</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="G11B20/00463" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>high-bandwidth digital content protection [HDCP]</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="G11B20/00471" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00471</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>video content protection system [VCPS]</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="G11B20/00478" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00478</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein contents are decrypted and re-encrypted with a different key when being copied from/to a record carrier</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="G11B20/00485" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00485</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier</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="G11B20/00492" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00492</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein content or user data is encrypted</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="G11B20/005" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein only some specific parts of the content are encrypted, e.g. encryption limited to I-frames</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00507" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00507</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein consecutive physical data units of the record carrier are encrypted with separate encryption keys, e.g. the key changes on a cluster or sector basis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00514" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00514</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the entire content is encrypted with the same key, e.g. disc key or master key</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00521" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00521</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein each session of a multisession recording medium is encrypted with a separate encryption key</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00528" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00528</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein each title is encrypted with a separate encryption key for each title, e.g. title key for movie, song or data file</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00536" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00536</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein encrypted content data is subjected to a further, iterated encryption, e.g. interwoven encryption</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="G11B20/00543" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00543</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein external data is encrypted, e.g. for secure communication with an external device or for encrypting content on a separate record carrier</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="G11B20/0055" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/0055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein license data is encrypted</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="G11B20/00557" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00557</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein further management data is encrypted, e.g. sector headers, TOC or the lead-in or lead-out areas</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="G11B20/00565" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00565</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein parity data is encrypted</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B20/00572" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00572</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving measures which change the format of the recording medium</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="G11B20/00579" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00579</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>said format change concerning the data encoding, e.g., modulation schemes violating run-length constraints, causing excessive DC content, or involving uncommon codewords or sync patterns</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="G11B20/00586" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00586</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>said format change concerning the physical format of the recording medium</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="G11B20/00594" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00594</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the shape of recording marks is altered, e.g. the depth, width, or length of pits</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="G11B20/00601" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00601</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein properties of tracks are altered, e.g., by changing the wobble pattern or the track pitch, or by adding interruptions or eccentricity</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="G11B20/00608" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00608</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the material that the record carrier is made of is altered, e.g. adding reactive dyes that alter the optical properties of a disc after prolonged exposure to light or air</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="G11B20/00615" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00615</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>said format change concerning the logical format of the recording medium, e.g. the structure of sectors, blocks, or frames</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="G11B20/00623" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00623</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the modification to the logical format directly concerns user data</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="G11B20/0063" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/0063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the modification to the logical format mainly concerns management data, e.g., by changing the format of the TOC or the subcode</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="G11B20/00637" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00637</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>said management data being address data</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B20/00644" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00644</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the address data format being such that there are overlapping address ranges</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B20/00652" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00652</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the address data being scrambled so that ascending address values do not reflect the physical order of data blocks</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="9" additional-only="false" sort-key="G11B20/00659" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00659</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a control step which is implemented as an executable file stored on the record carrier</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="G11B20/00666" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00666</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a step of erasing or nullifying data, e.g. data being overwritten with a random string</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="G11B20/00673" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00673</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the erased or nullified data include a cryptographic key</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="G11B20/00681" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00681</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving measures which prevent a specific kind of data access</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="G11B20/00688" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00688</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>said measures preventing that a usable copy of recorded data can be made on another medium</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="G11B20/00695" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00695</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>said measures preventing that data are read from the recording medium</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="G11B20/00702" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00702</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>said measures preventing that data are recorded on the recording medium</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="G11B20/0071" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/0071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a purchase action</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="G11B20/00717" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00717</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein accounting and payment are postponed, e.g. until the player can establish a network connection to the service provider</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="G11B20/00724" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00724</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a prepaid credit balance is registered on the recording medium</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="G11B20/00731" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00731</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a digital rights management system for enforcing a usage restriction</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="G11B20/00739" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00739</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the usage restriction is associated with a specific geographical region</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="G11B20/00746" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00746</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the usage restriction can be expressed as a specific number</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="G11B20/00753" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00753</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags</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="G11B20/0076" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the copy frequency, i.e. the number of copies in a given time period, is limited</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/00768" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00768</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B20/00775" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00775</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein said copy control information is encoded in an encryption mode indicator [EMI]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B20/00782" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00782</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the usage restriction limits the number of times a program can be installed</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="G11B20/00789" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00789</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the usage restriction limits the number of functional copies, which can be accessed at a time, e.g. electronic bookshelf concept, virtual library, video rentals or check-in/check out</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="G11B20/00797" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00797</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the usage restriction limits the number of times a content can be reproduced, e.g. using playback counters</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="G11B20/00804" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00804</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the usage restriction limits the number of users or devices that are allowed to access a given content</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="G11B20/00811" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00811</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein said number is encoded as a cryptographic token or ticket</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="G11B20/00818" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00818</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the usage restriction limits the signal quality, e.g. by low-pass filtering of audio signals or by reducing the resolution of video 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="G11B20/00826" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a spoiler signal is added to degrade the signal quality</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="G11B20/00833" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00833</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the usage restriction limits the data access speed, e.g. by defining a maximum bit rate of the I/O interface</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="G11B20/0084" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/0084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the usage restriction can be expressed as a specific time or date</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="G11B20/00847" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00847</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the usage restriction is defined by a licence file</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="G11B20/00855" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00855</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a step of exchanging information with a remote server</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="G11B20/00862" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00862</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the remote server can grant the permission to use a content</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="G11B20/00869" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00869</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the remote server can deliver the content to a receiving device</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B20/00876" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00876</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein physical copy protection means are attached to the medium, e.g. holograms, sensors, or additional semiconductor circuitry</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="G11B20/00884" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00884</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm</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="G11B20/00891" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00891</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>embedded in audio data</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="G11B20/00898" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00898</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on a hash function</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="G11B20/00905" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00905</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>multiple watermarks used in combination</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="G11B20/00913" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00913</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on a spread spectrum technique</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="G11B20/0092" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving measures which are linked to media defects or read/write errors</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="G11B20/00927" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00927</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein said defects or errors are generated on purpose, e.g. intended scratches</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="G11B20/00934" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00934</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>said intentional errors occurring because of corrupted address information</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="G11B20/00942" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00942</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>said intentional errors occurring due to an invalid playback path or program chain</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="G11B20/00949" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00949</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>said intentional errors occurring due to bad sectors, which are either physically destroyed or which are declared defective in the defect management information</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="G11B20/00956" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00956</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>said intentional errors occurring due to an invalid TOC</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="G11B20/00963" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00963</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein said defects or errors are not generated on purpose, e.g. random defect patterns occurring during the normal manufacture</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="G11B20/00971" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00971</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving measures for monitoring the industrial media production and distribution channels, e.g. for controlling content providers or the official manufacturers or replicators of recording media</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="G11B20/00978" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00978</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the record carrier stores a trial version of a content</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="G11B20/00985" definition-exists="false" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00985</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the trial version being of lower quality than the original version</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B20/00992" definition-exists="true" ipc-concordant="G11B20/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/00992</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Circuits for stereophonic or quadraphonic recording or reproducing</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="G11B20/02" definition-exists="true" ipc-concordant="G11B20/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Analogue recording or reproducing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B20/025" definition-exists="false" ipc-concordant="G11B20/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Error detection or correction</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="G11B20/04" definition-exists="false" ipc-concordant="G11B20/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Direct recording or reproducing</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="G11B20/06" definition-exists="false" ipc-concordant="G11B20/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B20/06</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Angle-modulation recording or reproducing</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="G11B20/08" definition-exists="false" ipc-concordant="G11B20/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B20/08</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Pulse-modulation recording or reproducing </text><reference><text>pulse-code-modulation recording <class-ref scheme="cpc">G11B20/10</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B20/10" definition-exists="true" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B20/10</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Digital recording or reproducing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B20/10009" definition-exists="true" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Improvement or modification of read or write signals</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="G11B20/10018" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B20/10018</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>analog processing for digital recording or reproduction </text><reference><text><class-ref scheme="cpc">G11B20/10037</class-ref> - <class-ref scheme="cpc">G11B20/10481</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B20/10027" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adjusting the signal strength during recording or reproduction, e.g. variable gain amplifiers </text><reference><text>optimum power control for optical discs <class-ref scheme="cpc">G11B7/125</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B20/10037" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10037</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof</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="G11B20/10046" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>filtering or equalising, e.g. setting the tap weights of an FIR filter</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="G11B20/10055" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using partial response filtering when writing the signal to the medium or reading it therefrom</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="G11B20/10064" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B20/10064</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>EEPR4 or E2PR4, i.e. extended partial response class 4, polynomial (1-D)*(1+D)<sup>3</sup></text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10074" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B20/10074</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>EPR4, i.e. extended partial response class 4, polynomial (1-D) *(1+D)<sup>2</sup></text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10083" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>PR1 or PR(1,1,), i.e. partial response class 1, polynomial 1+D</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10092" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>partial response PR(1,1,1,1)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10101" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10101</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>PR2 or PR(1,2,1), i.e. partial response class 2, polynomial (1+D)2=1+2D+D2</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10111" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10111</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>partial response PR(1,2,2,1)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/1012" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>partial response PR(1,2,2,2,1)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10129" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10129</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>partial response PR(1,2,3,3,2,1)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10138" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10138</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>partial response PR (2,3,3,2)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10148" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10148</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>partial response PR(1,3,3,1)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10157" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10157</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>PR3 or PR(2,1,-1), i.e. partial response class 3, polynomial (1+D)(2-D)=2+D-D2</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10166" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10166</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>partial response PR(3,4,4,3)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10175" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10175</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>PR4, PR(1,0,-1), i.e. partial response class 4, polynomial (1+D)(1-D)=(1-D2)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10185" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>PR5 or PR(-1,0,2,0,-1), i.e. partial response class 5, polynomial -((1+D)2) *((1-D)2) =-1+2D2-D4</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="G11B20/10194" definition-exists="true" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10194</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using predistortion during writing </text><reference><text><class-ref scheme="cpc">G11B20/10055</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B20/10203" definition-exists="true" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10203</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>baseline correction </text><reference><text>DC correction by choosing codewords of the modulation code <class-ref scheme="cpc">G11B20/1426</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B20/10212" definition-exists="true" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>G11B20/10212</classification-symbol><class-title date-revised="2022-08-01"><title-part><CPC-specific-text><text>compensation for data shift, e.g. pulse-crowding effects</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="G11B20/10222" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation </text><reference><text>dedicated sync patterns in the modulation code <class-ref scheme="cpc">G11B20/1403</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="G11B20/10231" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10231</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein an asynchronous, free-running clock is used; Interpolation of sampled 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="G11B20/1024" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a phase-locked loop [PLL] is used</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="G11B20/1025" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the PLL being discrete time or digital PLL</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="G11B20/10259" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10259</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>simultaneous timing recovery for multiple parallel tracks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B20/10268" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>bit detection or demodulation methods</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="G11B20/10277" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10277</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the demodulation process being specifically adapted to partial response channels, e.g. PRML decoding</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="G11B20/10287" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10287</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using probabilistic methods, e.g. maximum likelihood detectors </text><reference><text><class-ref scheme="cpc">G11B20/10277</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10296" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10296</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the Viterbi algorithm</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="G11B20/10305" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>signal quality assessment</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="G11B20/10314" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10314</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>amplitude of the recorded or reproduced signal</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="G11B20/10324" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10324</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>asymmetry of the recorded or reproduced waveform</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="G11B20/10333" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10333</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the asymmetry is linked to domain bloom</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="G11B20/10342" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10342</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>sub-information or auxiliary signals different from the normal recording marks, e.g. signals reproduced from wobble tracks</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="G11B20/10351" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10351</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>baseline shift, DC content, bias</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="G11B20/10361" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10361</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>digital demodulation process</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="G11B20/1037" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1037</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on hard decisions, e.g. by evaluating bit error rates before or after ECC decoding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10379" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10379</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on soft decisions, e.g. confidence values, probability estimates, likelihoods values or path metrics of a statistical decoding algorithm</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="G11B20/10388" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10388</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>control of the read or write heads, e.g. tracking errors, defocus or tilt compensation</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="G11B20/10398" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10398</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>jitter, timing deviations or phase and frequency errors</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="G11B20/10407" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by verifying the timing of signal transitions, e.g. rising or falling edges, or by analysing signal slopes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10416" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by verifying the timing of peak values</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10425" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by counting out-of-lock events of a PLL</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10435" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10435</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by verifying the timing of predetermined signal patterns, e.g. sync patterns</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/10444" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10444</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by verifying the timing of zero crossings</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="G11B20/10453" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10453</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>physical shape of recording marks, e.g. their length, width, depth or contour</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="G11B20/10462" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10462</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>consistency with a reference waveform in a given time period, e.g. by calculating correlations or mean square errors</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="G11B20/10472" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>derived from statistics of other quality measures, e.g. their mean, variance or skew</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="G11B20/10481" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10481</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>optimisation methods</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="G11B20/1049" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1049</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using closed-form solutions</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="G11B20/105" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>selecting parameter values from a plurality of predetermined settings</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="G11B20/10509" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10509</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>iterative methods, e.g. trial-and-error, interval search, gradient descent or feedback loops </text><reference><text><class-ref scheme="cpc">G11B20/10518</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B20/10518" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/10518</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using neural networks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B20/10527" definition-exists="true" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B20/10527</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Audio or video recording; Data buffering arrangements </text><reference><text><class-ref scheme="cpc">G11B20/12</class-ref> - <class-ref scheme="cpc">G11B20/18</class-ref> take precedence</text></reference></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="G11B20/10537" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10537</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Audio or video recording</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/10546" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10546</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specifically adapted for audio data</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10555" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10555</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the frequency, the amplitude, or other characteristics of the audio signal is taken into account</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/10564" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10564</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>frequency</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/10574" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10574</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>volume or amplitude</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/10583" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10583</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>parameters controlling audio interpolation processes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/10592" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10592</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specifically adapted for recording or reproducing multichannel signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10601" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10601</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>surround sound signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10611" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10611</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>3D video data</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B20/1062" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Data buffering arrangements, e.g. recording or playback buffers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/10629" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10629</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the buffer having a specific structure</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10638" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10638</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>First-in-first-out memories [FIFO] buffers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10648" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10648</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>First-in-last-out memories [LIFO] buffers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10657" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10657</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cache memories for random data access, e.g. buffers wherein the data output is controlled by a priority parameter other than retention time</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10666" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10666</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ring buffers, e.g. buffers wherein an iteratively progressing read or write pointer moves back to the beginning of the buffer when reaching the last storage cell</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/10675" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10675</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>aspects of buffer control</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10685" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>input interface, i.e. the way data enter the buffer, e.g. by informing the sender that the buffer is busy</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10694" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10694</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>output interface, i.e. the way data leave the buffer, e.g. by adjusting the clock rate</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10703" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10703</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>processing rate of the buffer, e.g. by accelerating the data output</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10712" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10712</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>buffer capacity, e.g. when the buffer capacity is exhausted, buffered data are overwritten with more recent data, accepting that the old data are lost</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10722" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10722</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the size of the buffer is variable, e.g. by adding additional memory cells for coping with input streams that have high bit rates</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10731" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10731</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the buffer I/O can be temporarily suspended, e.g. by refusing to accept further data to be buffered</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1074" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1074</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a specific threshold value</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/1075" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the usage of the buffer being restricted to a specific kind of data</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10759" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10759</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>content data</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/10768" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10768</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by pre-caching the initial portion of songs or other recorded or downloaded data for starting playback instantly</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10777" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10777</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>instructions or commands</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10787" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10787</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>parameters, e.g. for decoding or encoding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/10796" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10796</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>address data</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/10805" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10805</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving specific measures to prevent a buffer overflow</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="G11B20/10814" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10814</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving specific measures to prevent a buffer underrun</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="G11B20/10824" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10824</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the buffer being used to prevent vibrations or shocks from causing delays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B20/10833" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10833</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Copying or moving data from one record carrier to another</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="G11B20/10842" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10842</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein not all recorded data are copied or moved</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B20/10851" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10851</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Erasing data on the record carrier</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B20/10861" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10861</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Finalising a record carrier after a recording operation, e.g. to ensure compatibility with a ROM medium</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B20/1087" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a selection is made among at least two alternative ways of processing</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="G11B20/10879" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10879</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the kind of record carrier being the selection criterion</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="G11B20/10888" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10888</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the kind of data being the selection criterion</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B20/10898" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10898</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Overwriting or replacing recorded data</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="G11B20/10907" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10907</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pseudo-overwriting, i.e. virtually or logically overwriting data on WORM media by remapping recorded blocks to alternate areas</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B20/10916" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10916</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Seeking data on the record carrier for preparing an access to a specific address</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="G11B20/10925" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10925</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving an inter-layer jump, i.e. changing from one recording layer to another</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B20/10935" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10935</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a time constraint must be met</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="G11B20/10944" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10944</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Real-time recording or reproducing, e.g. for ensuring seamless playback of AV data</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="G11B20/10953" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10953</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Concurrent recording or playback of different streams or files</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/10962" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10962</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein both recording and playback take place simultaneously</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B20/10972" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10972</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Management of interruptions, e.g. due to editing</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="G11B20/10981" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/10981</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Recording or reproducing data when the data rate or the relative speed between record carrier and transducer is variable</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/1099" definition-exists="false" ipc-concordant="G11B20/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1099</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a disc is spun at a variable speed</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B20/12" definition-exists="true" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Formatting, e.g. arrangement of data block or words on the record carriers </text><CPC-specific-text><reference><text>within interface between computers and data recorders <class-ref scheme="cpc">G06F3/06</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B20/1201" definition-exists="true" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1201</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on tapes</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="G11B20/1202" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with longitudinal tracks only</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="G11B20/1204" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1204</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/1205" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for discontinuous data, e.g. digital information signals, computer programme data</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="G11B20/1207" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1207</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with transverse tracks only</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="G11B20/1208" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/1209" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for discontinuous data, e.g. digital information signals, computer programme data</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="G11B20/1211" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1211</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with different data track configurations </text><reference><text>longitudinal control tracks with transverse user data tracks <class-ref scheme="cpc">G11B20/1207</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/1212" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1212</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/1214" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1214</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for discontinuous data, e.g. digital information signals, computer programme data</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="G11B20/1215" definition-exists="true" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on cards </text><reference><text>optical aspect of optical cards <class-ref scheme="cpc">G11B7/0033</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="G11B20/1217" definition-exists="true" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1217</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on discs</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/1218" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1218</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the formatting concerns a specific area of the disc</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/122" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Burst cutting area [BCA]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1221" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1221</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>cluster, i.e. a data structure which consists of a fixed number of sectors or ECC blocks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1222" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ECC block, i.e. a block of error correction encoded symbols which includes all parity data needed for decoding </text><reference><text>pure error correction aspects <class-ref scheme="cpc">G11B20/18</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1224" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1224</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>extent, i.e. a set of sectors which numbers form a continuous ascending sequence</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1225" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>frame, i.e. a subunit of a sector containing user data, e.g. a sync frame</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1227" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>one layer of multilayer disc</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1228" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>middle zone or outer guard area of a multilayer disc</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1229" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1229</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>lead-in area</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1231" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1231</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>lead-out area</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1232" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1232</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>sector, i.e. the minimal addressable physical data unit</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1234" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1234</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the sector is a headerless sector, i.e. it does not comprise an ID field</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1235" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1235</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>session, i.e. a contiguous area having its own lead-in area, program area and lead-out area</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1237" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1237</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>recording side of a single layer medium</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1238" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1238</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>track, i.e. the entire a spirally or concentrically arranged path on which the recording marks are located</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1239" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1239</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the track being a pregroove, e.g. the wobbled track of a recordable optical disc</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1241" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1241</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>user area, i.e. the area of a disc where user data are to be recorded</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1242" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the area forming one or more zones, wherein each zone is shaped like an annulus or a circular sector</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1244" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>CAV zone, in which a constant angular velocity is used</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1245" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>CLV zone, in which a constant linear velocity is used</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1247" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>rewritable zone, e.g. a RAM zone of a hybrid disc having ROM and RAM areas</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1248" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1248</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ROM zone, i.e. an unrewritable zone</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/1249" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1249</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the bits are arranged on a two-dimensional hexagonal lattice</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="G11B20/1251" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1251</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data</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="G11B20/1252" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for discontinuous data, e.g. digital information signals, computer programme data</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="G11B20/1254" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for mixed data, i.e. continuous and discontinuous data</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="G11B20/1255" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fixed Block Architecture [FBA] format</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="G11B20/1257" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Count Key Data [CKD] format</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="G11B20/1258" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1258</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>where blocks are arranged within multiple radial zones, e.g. Zone Bit Recording or Constant Density Recording discs, MCAV discs, MCLV discs</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="G11B20/1259" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1259</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ROM/RAM areas</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="G11B20/1261" definition-exists="true" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on films, e.g. for optical moving-picture soundtracks </text><reference><text>optical aspect <class-ref scheme="cpc">G11B7/0032</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="G11B20/1262" definition-exists="true" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1262</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with more than one format/standard, e.g. conversion from CD-audio format to R-DAT format</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="G11B20/1264" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1264</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the formatting concerns a specific kind of data</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/1265" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control data, system data or management information, i.e. data used to access or process user data</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1267" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1267</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Address data</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1268" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Address in pregroove [ADIP] information</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1269" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1269</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Absolute time in pregroove [ATIP] information</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1271" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1271</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the address data being stored in a subcode, e.g. in the Q channel of a CD</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="G11B20/1272" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Burst indicator subcode [BIS]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1274" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1274</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>stored in pre-pits, i.e. in embossed pits, ROM marks or prepits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1275" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Calibration data, e.g. specific training patterns for adjusting equalizer settings or other recording or playback parameters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1277" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1277</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for managing gaps between two recordings, e.g. control data in linking areas, run-in or run-out fields, guard or buffer zones</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1278" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Physical format specifications of the record carrier, e.g. compliance with a specific standard, recording density, number of layers, start of data zone or lead-out</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1279" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1279</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Permanent information and control data stored in the PIC zone of a Blu-Ray disc</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1281" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1281</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Servo information</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1282" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in embedded servo fields</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1284" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in servo fields which split data fields</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1285" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-01-01" status="published"><classification-symbol>G11B2020/1285</classification-symbol><class-title date-revised="2017-01-01"><title-part><CPC-specific-text><text>Status of the record carrier, e.g. space bit maps, flags indicating a formatting status or a write permission</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1287" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1287</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation pattern, e.g. VCO fields </text><reference><text>specific bit sequences of sync patterns <class-ref scheme="cpc">G11B20/1403</class-ref>; A/V synchronisation <class-ref scheme="cpc">G11B27/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/1288" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Formatting by padding empty spaces with dummy data, e.g. writing zeroes or random data when de-icing optical discs</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="G11B20/1289" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1289</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Formatting of user data</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B20/1291" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1291</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the formatting serves a specific purpose</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/1292" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1292</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Enhancement of the total storage capacity</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="G11B20/1294" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1294</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Increase of the access speed</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1295" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1295</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the focus is on the read access speed</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/1297" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1297</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the focus is on the write access speed</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/1298" definition-exists="false" ipc-concordant="G11B20/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1298</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Enhancement of the signal quality</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B20/14" definition-exists="true" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using self-clocking codes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B20/1403" definition-exists="true" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the use of two levels</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="G11B20/1407" definition-exists="true" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol</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="G11B20/1411" definition-exists="true" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1411</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>conversion to or from pulse width coding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/1415" definition-exists="true" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1415</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>conversion to or from pulse frequency coding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B20/1419" definition-exists="true" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1419</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or <u>vice versa</u>, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or <u>vice versa</u>, e.g. double frequency code, FM code</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="G11B20/1423" definition-exists="true" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code</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="G11B20/1426" definition-exists="true" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>conversion to or from block codes or representations thereof</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/143" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>4 to 6 modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1434" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1434</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>8 to 9 modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1438" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1438</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>8 to 10 modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1442" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1442</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>8 to 12 modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1446" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>16 to 17 modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1449" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1449</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>24 to 25 modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1453" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1453</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>17PP modulation, i.e. the parity preserving RLL(1,7) code with rate 2/3 used on Blu-Ray discs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1457" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1457</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein DC control is performed by calculating a digital sum value [DSV]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1461" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1461</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>8 to 14 modulation, e.g. the EFM code used on CDs or mini-discs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1465" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1465</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>8 to 16 modulation, e.g. the EFM+ code used on DVDs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1469" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1469</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>modulation code with one or more merging bits between consecutive codewords</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G11B20/1473" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1473</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>modulation code without any merging bits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/1476" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1476</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronisation patterns; Coping with defects thereof</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/148" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/148</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using error detecting or error correcting codes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/1484" definition-exists="false" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1484</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Codewords used in servo patterns</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="G11B20/1488" definition-exists="true" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1488</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the use of three levels</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="G11B20/1492" definition-exists="true" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1492</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>two levels are symmetric, in respect of the sign to the third level which is "zero"</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="G11B20/1496" definition-exists="true" ipc-concordant="G11B20/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1496</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the use of more than three levels</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="G11B20/16" definition-exists="true" ipc-concordant="G11B20/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using non self-clocking codes, i.e. the clock signals are either recorded in a separate clocking track or in a combination of several information tracks</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="G11B20/18" definition-exists="true" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B20/18</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Error detection or correction</text></title-part><title-part><text>Testing </text><CPC-specific-text><text>, e.g. of drop-outs</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="G11B20/1803" definition-exists="true" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1803</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by redundancy in data representation</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="G11B20/1806" definition-exists="true" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pulse code modulation systems for audio signals </text><reference><text><class-ref scheme="cpc">G11B20/1803</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="G11B20/1809" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1809</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by interleaving</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="G11B20/1813" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1813</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by adding special bits or symbols to the coded information </text><reference><text><class-ref scheme="cpc">G11B20/1809</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B20/1816" definition-exists="true" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Testing</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="G11B20/182" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using test patterns</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="G11B20/1823" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1823</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a flag is set when errors are detected or qualified</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="G11B20/1826" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a defect list or error map is generated</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="G11B20/183" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein at least one additional attempt is made to read or write the data when a first attempt is unsuccessful</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="G11B20/1833" definition-exists="true" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1833</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by adding special lists or symbols to the coded information </text><reference><text><class-ref scheme="cpc">G11B20/1806</class-ref>, <class-ref scheme="cpc">G11B20/1866</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/1836" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1836</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a Reed Solomon [RS] code</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B20/184" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/184</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a cross-interleaved Reed Solomon [CIRC]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B20/1843" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1843</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a cyclic redundancy check [CRC]</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="G11B20/1846" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1846</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a picket code, i.e. a code in which a long distance code [LDC] is arranged as an array and columns containing burst indicator subcode [BIS] are multiplexed for erasure decoding</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="G11B20/185" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an low density parity check [LDPC] code</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="G11B20/1853" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1853</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a product code which has inner and outer parity symbols</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="G11B20/1856" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1856</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a turbo code</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="G11B20/1859" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1859</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein a trellis is used for decoding the error correcting code</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="G11B20/1863" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1863</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the Viterbi algorithm is used for decoding the error correcting code</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="G11B20/1866" definition-exists="true" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by interleaving </text><reference><text><class-ref scheme="cpc">G11B20/1809</class-ref> takes precedence</text></reference></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="G11B20/1869" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1869</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Preventing ageing phenomena from causing data loss, e.g. by monitoring the age of record carriers or by recognising wear, and by copying information elsewhere when a record carrier becomes unreliable</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="G11B20/1873" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1873</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Temporary defect structures for write-once discs, e.g. TDDS, TDMA or TDFL</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="G11B20/1876" definition-exists="true" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1876</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interpolating methods</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="G11B20/1879" definition-exists="true" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1879</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Direct read-after-write methods</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="G11B20/1883" definition-exists="true" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1883</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methods for assignment of alternate areas for defective areas</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="G11B20/1886" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1886</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with tapes</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="G11B20/1889" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/1889</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with discs</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="G11B20/1893" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1893</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using linear replacement to relocate data from a defective block to a non-contiguous spare area, e.g. with a secondary defect list [SDL]</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="G11B20/1896" definition-exists="false" ipc-concordant="G11B20/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2020/1896</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using skip or slip replacement to relocate data from a defective block to the next usable block, e.g. with a primary defect list [PDL]</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="G11B20/20" definition-exists="true" ipc-concordant="G11B20/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for correction of skew for multitrack recording</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="G11B20/22" definition-exists="true" ipc-concordant="G11B20/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for reducing distortions</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B20/225" definition-exists="false" ipc-concordant="G11B20/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for reducing wow or flutter </text><reference><text>by controlling the speed of the record carrier <class-ref scheme="cpc">G11B15/46</class-ref>, <class-ref scheme="cpc">G11B19/28</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="G11B20/24" definition-exists="true" ipc-concordant="G11B20/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B20/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for reducing noise </text><CPC-specific-text><reference><text>control of amplification in general, e.g. dependent upon noise level <class-ref scheme="cpc">H03G</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11B21/00" definition-exists="true" ipc-concordant="G11B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Head arrangements not specific to the method of recording or reproducing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B21/003" definition-exists="false" ipc-concordant="G11B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disposition of fixed heads, e.g. for scanning, selecting or following of tracks</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B21/006" definition-exists="false" ipc-concordant="G11B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for track following</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="G11B21/02" definition-exists="false" ipc-concordant="G11B21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Driving or moving of heads</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B21/022" definition-exists="false" ipc-concordant="G11B21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Programmed access in sequence to indexed parts of operating record carriers</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="G11B21/025" definition-exists="false" ipc-concordant="G11B21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of rotating discs</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="G11B21/027" definition-exists="false" ipc-concordant="G11B21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of tapes</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="G11B21/03" definition-exists="false" ipc-concordant="G11B21/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for correcting time base error </text><CPC-specific-text><text>during transducing operation, by driving or moving the head in a direction more or less parallel to the direction of travel of the recording medium, e.g. tangential direction on a rotating disc </text><reference><text>by driving or moving the head in a direction which cuts across the direction of travel of the recording medium <class-ref scheme="cpc">G11B15/1808</class-ref>, <class-ref scheme="cpc">G11B15/467</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="G11B21/04" definition-exists="false" ipc-concordant="G11B21/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B21/04</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Automatic feed mechanism producing a </text><CPC-specific-text><text>progressive</text></CPC-specific-text><text> transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan </text><CPC-specific-text><text>, e.g. by lead-screw </text><reference><text><class-ref scheme="cpc">G11B19/20</class-ref>, <class-ref scheme="cpc">G11B21/08</class-ref> and <class-ref scheme="cpc">G11B21/10</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B21/043" definition-exists="false" ipc-concordant="G11B21/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for stationary discs</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="G11B21/046" definition-exists="false" ipc-concordant="G11B21/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>details of the feed mechanism</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="G11B21/06" definition-exists="false" ipc-concordant="G11B21/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B21/06</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>the record carrier having </text><CPC-specific-text><text>mechanical</text></CPC-specific-text><text> means to ensure traverse movement of the head </text><CPC-specific-text><text>, e.g. grooves</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="G11B21/08" definition-exists="false" ipc-concordant="G11B21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Track changing or selecting </text><reference><text><class-ref scheme="cpc">G11B21/12</class-ref> takes precedence</text></reference><CPC-specific-text><text>during transducing operation</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="G11B21/081" definition-exists="false" ipc-concordant="G11B21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Access to indexed tracks or parts of continuous track</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="G11B21/083" definition-exists="false" ipc-concordant="G11B21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on discs</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="G11B21/085" definition-exists="false" ipc-concordant="G11B21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with track following of accessed part</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="G11B21/086" definition-exists="false" ipc-concordant="G11B21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on tapes</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="G11B21/088" definition-exists="false" ipc-concordant="G11B21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with track following of accessed part</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B21/10" definition-exists="false" ipc-concordant="G11B21/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Track finding or aligning by moving the head </text><CPC-specific-text><text>Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following </text><reference><text>characterised by the track access method <class-ref scheme="cpc">G11B21/08</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B21/103" definition-exists="false" ipc-concordant="G11B21/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on tapes</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="G11B21/106" definition-exists="false" ipc-concordant="G11B21/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on disks</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="G11B21/12" definition-exists="false" ipc-concordant="G11B21/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Raising and lowering</text></title-part><title-part><text>Back-spacing or forward-spacing along track</text></title-part><title-part><text>Returning to starting position </text><CPC-specific-text><text>otherwise than during transducing operation</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="G11B21/14" definition-exists="false" ipc-concordant="G11B21/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>manually</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B21/16" definition-exists="false" ipc-concordant="G11B21/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Supporting the heads</text></title-part><title-part><text>Supporting the sockets for plug-in heads</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B21/18" definition-exists="false" ipc-concordant="G11B21/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>while the head is moving</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="G11B21/20" definition-exists="false" ipc-concordant="G11B21/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B21/21" definition-exists="false" ipc-concordant="G11B21/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/21</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with provision for maintaining desired spacing of head from record carrier, e.g. fluid-dynamic spacing, slider</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="G11B21/22" definition-exists="false" ipc-concordant="G11B21/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>while the head is out of operative position</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="G11B21/24" definition-exists="false" ipc-concordant="G11B21/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Head support adjustments</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="G11B21/26" definition-exists="false" ipc-concordant="G11B21/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B21/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for interchange or replacement of head or head element</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11B23/00" definition-exists="true" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Record carriers not specific to the method of recording or reproducing</text></title-part><title-part><text>Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus </text><CPC-specific-text><text>Intermediate mediums; Apparatus or processes specially adapted for their manufacture </text><reference><text>processes involving a single technical art and for which provision exists elsewhere, <u>see</u> the relevant class, e.g. <class-ref scheme="cpc">B29</class-ref>, <class-ref scheme="cpc">B41M</class-ref>, <class-ref scheme="cpc">B05D</class-ref>, <class-ref scheme="cpc">C08L</class-ref>, <class-ref scheme="cpc">F16N</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> In group <class-ref scheme="cpc">G11B23/00</class-ref>, recording or reproducing apparatus does not include the record carriers. </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="G11B23/0007" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-11-01" status="published"><classification-symbol>G11B23/0007</classification-symbol><class-title date-revised="2015-11-01"><title-part><CPC-specific-text><text>Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information, </text><reference><text>volume compression or expansion circuits <u>per se</u> <class-ref scheme="cpc">H03G7/00</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> This group is closed down and will in due course be transferred to <class-ref scheme="cpc">G11B20/22</class-ref> and <class-ref scheme="cpc">G11B20/24</class-ref> and subgroups </note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B23/0014" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>record carriers not specifically of filamentary or web form </text><reference><text><class-ref scheme="cpc">G11B23/0057</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="G11B23/0021" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>discs</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="G11B23/0028" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0028</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="11" additional-only="false" sort-key="G11B23/0035" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>means incorporated in the disc, e.g. hub, to enable its guiding, loading or driving </text><reference><text>means for driving the head <class-ref scheme="cpc">G11B21/06</class-ref>; guiding the disc for centering or locking <class-ref scheme="cpc">G11B17/022</class-ref>; turntables or spindles for driving <class-ref scheme="cpc">G11B19/2009</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B23/0042" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for auxiliary features </text><reference><text>sensing such features <class-ref scheme="cpc">G11B17/00</class-ref>, <class-ref scheme="cpc">G11B19/02</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B23/005" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>flexible discs </text><reference><text><class-ref scheme="cpc">G11B23/0035</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B23/0057" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure </text><reference><text>for record carriers with directly readable mechanical information <class-ref scheme="cpc">G11B3/685</class-ref></text></reference><text>; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B23/0064" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>mediums or carriers characterised by the selection of the material</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="G11B23/0071" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>additional layers for lubrication or wear protection </text><reference><text>lubricating means not integrated in the record carrier structure <class-ref scheme="cpc">G11B23/50</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="G11B23/0078" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>information structure layers using metallic or dielectric coatings</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="G11B23/0085" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>intermediate mediums using a photosensitive material, e.g. photo-resist</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="G11B23/0092" definition-exists="false" ipc-concordant="G11B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>molding resin compositions</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B23/02" definition-exists="false" ipc-concordant="G11B23/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B23/02</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Containers</text></title-part><title-part><text>Storing means </text><CPC-specific-text><text>both adapted to cooperate with the recording or reproducing means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B23/021" definition-exists="false" ipc-concordant="G11B23/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising means for reducing influence of physical parameters, e.g. temperature change, moisture </text><reference><text>combined with means for reconditioning or cleaning <class-ref scheme="cpc">G11B23/507</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="G11B23/023" definition-exists="false" ipc-concordant="G11B23/023" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Containers for magazines or cassettes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B23/0233" definition-exists="false" ipc-concordant="G11B23/023" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0233</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Containers for a single cassette</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="G11B23/0236" definition-exists="false" ipc-concordant="G11B23/023" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Containers for several cassettes</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="G11B23/027" definition-exists="false" ipc-concordant="G11B23/027" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Containers for single reels or spools</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="G11B23/03" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Containers for flat record carriers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B23/0301" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0301</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="11" additional-only="false" sort-key="G11B23/0302" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary features</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="G11B23/0303" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0303</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Write protect features with a sliding part</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B23/0305" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Semiconductor memories</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="G11B23/0306" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0306</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for locking the record carriers</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="G11B23/0307" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0307</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Positioning or centering features</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="G11B23/0308" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0308</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shutters </text><reference><text><class-ref scheme="cpc">G11B23/0317</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B23/031" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Indicating means, e.g. sticker, bar code</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="G11B23/0311" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0311</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wrong insertion preventing means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B23/0312" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0312</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Driving features</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="G11B23/0313" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0313</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Container cases</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="G11B23/0315" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0315</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Materials</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B23/0316" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0316</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional details, e.g. shape</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="G11B23/0317" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0317</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Containers with interchangeable record carriers</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="G11B23/0318" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0318</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Containers with incorporated transducing heads</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="G11B23/032" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for rigid discs</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="G11B23/0321" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0321</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>rigid cartridges for single discs</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="G11B23/0322" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0322</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising latching or movable handling devices </text><reference><text><class-ref scheme="cpc">G11B17/032</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="11" additional-only="false" sort-key="G11B23/0323" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0323</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for disc-packs</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="G11B23/0325" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising latching or movable handling devices </text><reference><text><class-ref scheme="cpc">G11B17/038</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B23/0326" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0326</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Assembling of containers</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="G11B23/0327" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0327</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for special applications not otherwise provided for</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="G11B23/0328" definition-exists="false" ipc-concordant="G11B23/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0328</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the disc having to be extracted from the cartridge for recording reproducing, e.g. cooperating with an extractable tray</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="G11B23/033" definition-exists="false" ipc-concordant="G11B23/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/033</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for flexible discs</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B23/0332" definition-exists="false" ipc-concordant="G11B23/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0332</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for single discs, e.g. envelopes</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="G11B23/0335" definition-exists="false" ipc-concordant="G11B23/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0335</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for disc packs</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="G11B23/0337" definition-exists="false" ipc-concordant="G11B23/033" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0337</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising latching or movable handling devices </text><reference><text><class-ref scheme="cpc">G11B23/0325</class-ref> and <class-ref scheme="cpc">G11B17/038</class-ref> take precedence</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="9" additional-only="false" sort-key="G11B23/037" definition-exists="false" ipc-concordant="G11B23/037" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/037</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Single reels or spools</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="G11B23/04" definition-exists="false" ipc-concordant="G11B23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B23/04</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Magazines</text></title-part><title-part><text>Cassettes </text><CPC-specific-text><text>for webs or filaments</text></CPC-specific-text><reference><text><class-ref scheme="cpc">G11B23/12</class-ref> takes precedence </text><CPC-specific-text><text>; cassettes with sealing or locking means <class-ref scheme="cpc">G11B23/28</class-ref>; dummy cassettes for locking in the drive <class-ref scheme="cpc">G11B33/005</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B23/041" definition-exists="false" ipc-concordant="G11B23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/041</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="11" additional-only="false" sort-key="G11B23/042" definition-exists="false" ipc-concordant="G11B23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary features </text><reference><text>sensing such features <class-ref scheme="cpc">G11B15/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B23/043" definition-exists="false" ipc-concordant="G11B23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Brakes for tapes or tape reels</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="G11B23/044" definition-exists="false" ipc-concordant="G11B23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reels or cores; positioning of the reels in the cassette</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="G11B23/045" definition-exists="false" ipc-concordant="G11B23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Covers</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="G11B23/046" definition-exists="false" ipc-concordant="G11B23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Indicating means, e.g. quantity of tape</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="G11B23/047" definition-exists="false" ipc-concordant="G11B23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Guiding means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B23/048" definition-exists="false" ipc-concordant="G11B23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Driving features</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B23/049" definition-exists="false" ipc-concordant="G11B23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/049</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cassettes for special applications not otherwise provided for</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="G11B23/06" definition-exists="false" ipc-concordant="G11B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for housing endless webs or filaments</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B23/07" definition-exists="false" ipc-concordant="G11B23/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/07</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a single reel or core</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="G11B23/08" definition-exists="false" ipc-concordant="G11B23/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for housing webs or filaments having two distinct ends</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B23/087" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using two different reels or cores</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B23/08707" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08707</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="13" additional-only="false" sort-key="G11B23/08714" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08714</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary features </text><reference><text>sensing such features <class-ref scheme="cpc">G11B15/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B23/08721" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08721</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Brakes for tapes or tape reels </text><reference><text><class-ref scheme="cpc">G11B23/08707</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="13" additional-only="false" sort-key="G11B23/08728" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08728</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reels or cores; positioning of the reels in the cassette</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B23/08735" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08735</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Covers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B23/08742" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08742</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with brake 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="13" additional-only="false" sort-key="G11B23/0875" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/0875</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Indicating means, e.g. quantity of tape</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B23/08757" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08757</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Guiding means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B23/08764" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08764</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Liner sheets</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B23/08771" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08771</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pressure pads</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B23/08778" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08778</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Driving features, e.g. belt</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B23/08785" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08785</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Envelopes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B23/08792" definition-exists="false" ipc-concordant="G11B23/087" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/08792</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shielding devices</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B23/093" definition-exists="false" ipc-concordant="G11B23/093" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/093</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the reels or cores being coaxial</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="G11B23/107" definition-exists="false" ipc-concordant="G11B23/107" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using one reel or core, one end of the record carrier coming out of the magazine or cassette</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="G11B23/113" definition-exists="false" ipc-concordant="G11B23/113" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B23/113</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Apparatus or processes specially adapted for the manufacture of magazines or cassettes </text><CPC-specific-text><text>, e.g. initial loading into container </text><reference><text>processes involving a single technical art and for which provision exists elsewhere, <u>see</u> the relevant class, e.g. <class-ref scheme="cpc">B21</class-ref>, <class-ref scheme="cpc">B29</class-ref>, <class-ref scheme="cpc">B65</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="G11B23/12" definition-exists="false" ipc-concordant="G11B23/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bins for random storage of webs or filaments</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="G11B23/14" definition-exists="false" ipc-concordant="G11B23/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>providing ability to repeat location, e.g. using sprocket holes</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="G11B23/16" definition-exists="false" ipc-concordant="G11B23/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Record carriers with single-track for recording at spaced intervals along the track thereof, e.g. for speech or language training </text><CPC-specific-text><text>contains no documents</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="G11B23/18" definition-exists="false" ipc-concordant="G11B23/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Record carriers with multiple tracks, e.g. with complementary and partial tracks such as paired "stereo" tracks </text><CPC-specific-text><text>contains no documents</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="G11B23/20" definition-exists="false" ipc-concordant="G11B23/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with provision for splicing to provide permanent or temporary connections</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B23/22" definition-exists="false" ipc-concordant="G11B23/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of endless belts</text></title-part><title-part><text>of tapes forming Moebius loops</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="G11B23/24" definition-exists="false" ipc-concordant="G11B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of tapes having multiple tracks parallel to edge of record carrier by offset splicing to form endless loop with one or more helical tracks</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="G11B23/26" definition-exists="false" ipc-concordant="G11B23/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of leaders for loading or threading, e.g. to form a temporary connection</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="G11B23/28" definition-exists="false" ipc-concordant="G11B23/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B23/28</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Indicating </text><CPC-specific-text><text>or preventing</text></CPC-specific-text><text> prior or unauthorised use, </text><CPC-specific-text><text>e.g. cassettes with sealing or locking means, write-protect devices for discs </text><reference><text>write-protect devices for tapes <class-ref scheme="cpc">G11B23/042</class-ref>, <class-ref scheme="cpc">G11B23/08714</class-ref>; dummy cassettes for locking in the drive <class-ref scheme="cpc">G11B33/005</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="G11B23/281" definition-exists="false" ipc-concordant="G11B23/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/281</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by changing the physical properties of the record carrier</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="G11B23/282" definition-exists="false" ipc-concordant="G11B23/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Limited play</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="G11B23/283" definition-exists="false" ipc-concordant="G11B23/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Security features, e.g. digital codes</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="G11B23/284" definition-exists="false" ipc-concordant="G11B23/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on the record carrier</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="G11B23/285" definition-exists="false" ipc-concordant="G11B23/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on the container or cartridge</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="G11B23/286" definition-exists="false" ipc-concordant="G11B23/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Antitheft arrangements, e.g. Electronic Article Surveillance [EAS] tags</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="G11B23/287" definition-exists="false" ipc-concordant="G11B23/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/287</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by mechanical lock</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="G11B23/288" definition-exists="false" ipc-concordant="G11B23/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protecting disks from being written or overwritten</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="G11B23/30" definition-exists="false" ipc-concordant="G11B23/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B23/30</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>with provision for auxiliary signals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B23/32" definition-exists="false" ipc-concordant="G11B23/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrical or mechanical contacting means</text></title-part><title-part><text>Tape stop foils</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="G11B23/34" definition-exists="false" ipc-concordant="G11B23/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G11B23/34</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Signal means additional to the main recording track, e.g. photoelectric sensing of sprocket holes for timing</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="G11B23/36" definition-exists="false" ipc-concordant="G11B23/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Signals on record carriers or on containers and recorded by the same method as the main recording</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="G11B23/38" definition-exists="false" ipc-concordant="G11B23/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Visual features other than those contained in record tracks or represented by sprocket holes </text><CPC-specific-text><text>the visual signals being auxiliary signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B23/40" definition-exists="false" ipc-concordant="G11B23/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Identifying or analogous means applied to or incorporated in the record carrier and not intended for visual display simultaneously with the playing-back of the record carrier, e.g. label, leader, photograph</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="G11B23/42" definition-exists="false" ipc-concordant="G11B23/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Marks for indexing, speed-controlling, synchronising, or timing</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="G11B23/44" definition-exists="false" ipc-concordant="G11B23/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Information for display simultaneously with playback of the record, e.g. photographic matter </text><reference><text>associated working of cameras or projectors with sound recording or reproducing means <class-ref scheme="cpc">G03B31/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B23/50" definition-exists="false" ipc-concordant="G11B23/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B23/50</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Reconditioning of record carriers</text></title-part><title-part><text>Cleaning of record carriers </text><CPC-specific-text><text>; Carrying-off electrostatic charges</text></CPC-specific-text><reference><text><class-ref scheme="cpc">G11B3/58</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="G11B23/502" definition-exists="false" ipc-concordant="G11B23/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/502</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of tape carriers</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="G11B23/505" definition-exists="false" ipc-concordant="G11B23/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-02-01" status="published"><classification-symbol>G11B23/505</classification-symbol><class-title date-revised="2017-02-01"><title-part><CPC-specific-text><text>of disk carriers</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="G11B23/507" definition-exists="false" ipc-concordant="G11B23/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B23/507</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>combined with means for reducing influence of physical parameters, e.g. temperature change, moisture</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="G11B25/00" definition-exists="true" ipc-concordant="G11B25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B25/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing </text><CPC-specific-text><text>, e.g. dictating apparatus; Combinations of such apparatus</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B25/02" definition-exists="false" ipc-concordant="G11B25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B25/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using cylindrical record carriers</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="G11B25/04" definition-exists="true" ipc-concordant="G11B25/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B25/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using flat record carriers, e.g. disc, card</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B25/043" definition-exists="true" ipc-concordant="G11B25/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B25/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using rotating discs</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="G11B25/046" definition-exists="true" ipc-concordant="G11B25/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-02-01" status="published"><classification-symbol>G11B25/046</classification-symbol><class-title date-revised="2017-02-01"><title-part><CPC-specific-text><text>using stationary discs, or cards provided with a circular recording area </text><reference><text>driving heads relatively to stationary record carriers for mechanical transducing <class-ref scheme="cpc">G11B3/40</class-ref>; automatic feed mechanism producing a transducing traverse of the head across stationary disk tracks <class-ref scheme="cpc">G11B21/043</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="G11B25/06" definition-exists="true" ipc-concordant="G11B25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B25/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using web-form record carriers, e.g. tape</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B25/063" definition-exists="true" ipc-concordant="G11B25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B25/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using tape inside container</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="G11B25/066" definition-exists="true" ipc-concordant="G11B25/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B25/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for use with containers of different sizes or configurations; adaptor devices therefor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B25/08" definition-exists="true" ipc-concordant="G11B25/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B25/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using filamentary record carriers, e.g. wire</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="G11B25/10" definition-exists="true" ipc-concordant="G11B25/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G11B25/10</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Apparatus capable of using record carriers defined in more than one of the sub-groups <class-ref scheme="cpc">G11B25/02</class-ref> - <class-ref scheme="cpc">G11B25/08</class-ref>; </text><CPC-specific-text><text>Adaptor devices therefor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11B27/00" definition-exists="true" ipc-concordant="G11B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Editing</text></title-part><title-part><text>Indexing</text></title-part><title-part><text>Addressing</text></title-part><title-part><text>Timing or synchronising</text></title-part><title-part><text>Monitoring</text></title-part><title-part><text>Measuring tape travel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B27/002" definition-exists="false" ipc-concordant="G11B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G11B27/002</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Programmed access in sequence to a plurality of record carriers or indexed parts, e.g. tracks, thereof, e.g. for editing; </text><reference><text>transfer of record carriers from magazine <class-ref scheme="cpc">G11B15/68</class-ref>, <class-ref scheme="cpc">G11B17/10</class-ref>; <class-ref scheme="cpc">G11B17/22</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="G11B27/005" definition-exists="false" ipc-concordant="G11B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reproducing at a different information rate from the information rate of recording </text><reference><text>for television signals <class-ref scheme="cpc">H04N5/783</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="G11B27/007" definition-exists="false" ipc-concordant="G11B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>reproducing continuously a part of the information, i.e. repeating</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="G11B27/02" definition-exists="false" ipc-concordant="G11B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B27/02</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B27/022" definition-exists="false" ipc-concordant="G11B27/022" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electronic editing of analogue information signals, e.g. audio or video signals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B27/024" definition-exists="false" ipc-concordant="G11B27/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>on tapes </text><reference><text><class-ref scheme="cpc">G11B27/028</class-ref>, <class-ref scheme="cpc">G11B27/029</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B27/026" definition-exists="false" ipc-concordant="G11B27/026" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>on discs </text><reference><text><class-ref scheme="cpc">G11B27/028</class-ref>, <class-ref scheme="cpc">G11B27/029</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B27/028" definition-exists="false" ipc-concordant="G11B27/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with computer assistance</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="G11B27/029" definition-exists="false" ipc-concordant="G11B27/029" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/029</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Insert-editing</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="G11B27/031" definition-exists="false" ipc-concordant="G11B27/031" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/031</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electronic editing of digitised analogue information signals, e.g. audio or video signals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B27/032" definition-exists="false" ipc-concordant="G11B27/032" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/032</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>on tapes </text><reference><text><class-ref scheme="cpc">G11B27/036</class-ref>, <class-ref scheme="cpc">G11B27/038</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B27/034" definition-exists="false" ipc-concordant="G11B27/034" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/034</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>on discs </text><reference><text><class-ref scheme="cpc">G11B27/036</class-ref>, <class-ref scheme="cpc">G11B27/038</class-ref> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B27/036" definition-exists="false" ipc-concordant="G11B27/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/036</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Insert-editing</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="G11B27/038" definition-exists="false" ipc-concordant="G11B27/038" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/038</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cross-faders therefor</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B27/04" definition-exists="false" ipc-concordant="G11B27/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using differential drive of record carrier and head </text><CPC-specific-text><reference><text>transferred to <class-ref scheme="cpc">G11B15/1875</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="G11B27/06" definition-exists="false" ipc-concordant="G11B27/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cutting and rejoining</text></title-part><title-part><text>Notching, or perforating record carriers otherwise than by recording styli </text><reference><text>record carriers with provision for splicing <class-ref scheme="cpc">G11B23/20</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B27/10" definition-exists="false" ipc-concordant="G11B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing</text></title-part><title-part><text>Addressing</text></title-part><title-part><text>Timing or synchronising</text></title-part><title-part><text>Measuring tape travel</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B27/102" definition-exists="false" ipc-concordant="G11B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Programmed access in sequence to addressed parts of tracks of operating record carriers </text><reference><text>access by moving the head <class-ref scheme="cpc">G11B3/08</class-ref>, <class-ref scheme="cpc">G11B5/54</class-ref>, <class-ref scheme="cpc">G11B7/085</class-ref>, <class-ref scheme="cpc">G11B21/022</class-ref>; by moving the record carrier <class-ref scheme="cpc">G11B15/005</class-ref>, <class-ref scheme="cpc">G11B17/005</class-ref>, by driving of both record carrier and head <class-ref scheme="cpc">G11B15/1816</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="G11B27/105" definition-exists="false" ipc-concordant="G11B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of operating discs</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="G11B27/107" definition-exists="false" ipc-concordant="G11B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of operating tapes</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="G11B27/11" definition-exists="false" ipc-concordant="G11B27/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using information not detectable on the record carrier</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B27/13" definition-exists="false" ipc-concordant="G11B27/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the information being derived from movement of the record carrier, e.g. using tachometer</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B27/15" definition-exists="false" ipc-concordant="G11B27/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using mechanical sensing means </text><CPC-specific-text><reference><text><u>see</u> provisionally also <class-ref scheme="cpc">G11B27/13</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B27/17" definition-exists="false" ipc-concordant="G11B27/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electrical sensing means </text><CPC-specific-text><reference><text><u>see</u> provisionally also <class-ref scheme="cpc">G11B27/13</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B27/19" definition-exists="false" ipc-concordant="G11B27/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/19</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using information detectable on the record carrier</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B27/22" definition-exists="false" ipc-concordant="G11B27/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means responsive to presence or absence of recorded information signals</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="G11B27/24" definition-exists="false" ipc-concordant="G11B27/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B27/24</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>by sensing features on the record carrier other than the transducing track </text><CPC-specific-text><text>; sensing signals or marks recorded by another method than the main recording</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="G11B27/26" definition-exists="false" ipc-concordant="G11B27/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by photoelectric detection, e.g. of sprocket holes</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="G11B27/28" definition-exists="false" ipc-concordant="G11B27/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using information signals recorded by the same method as the main recording </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B27/22</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="G11B27/30" definition-exists="false" ipc-concordant="G11B27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>on the same track as the main recording</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B27/3009" definition-exists="false" ipc-concordant="G11B27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/3009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used signal is a pilot signal inside the frequency band of the recorded main information signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B27/3018" definition-exists="false" ipc-concordant="G11B27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/3018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used signal is a pilot signal outside the frequency band of the recorded main information signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B27/3027" definition-exists="false" ipc-concordant="G11B27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/3027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used signal is digitally coded</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B27/3036" definition-exists="false" ipc-concordant="G11B27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/3036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time code signal</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B27/3045" definition-exists="false" ipc-concordant="G11B27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/3045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>superimposed on the recorded main signal, e.g. burn-in-time code</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G11B27/3054" definition-exists="false" ipc-concordant="G11B27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/3054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vertical Interval Time code [VITC]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B27/3063" definition-exists="false" ipc-concordant="G11B27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/3063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Subcodes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B27/3072" definition-exists="false" ipc-concordant="G11B27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/3072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coded signal uses a correlation function for detection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B27/3081" definition-exists="false" ipc-concordant="G11B27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/3081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used signal is a video-frame or a video-field (P.I.P)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B27/309" definition-exists="false" ipc-concordant="G11B27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/309</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Table of contents</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="G11B27/32" definition-exists="false" ipc-concordant="G11B27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>on separate auxiliary tracks of the same or an auxiliary record carrier</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B27/321" definition-exists="false" ipc-concordant="G11B27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/321</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used signal consists of two 180-degr. phase shifted signals of the same frequency</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B27/322" definition-exists="false" ipc-concordant="G11B27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/322</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used signal is digitally coded</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B27/323" definition-exists="false" ipc-concordant="G11B27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/323</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time code signal, e.g. on a cue track as SMPTE- or EBU-time code</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B27/324" definition-exists="false" ipc-concordant="G11B27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/324</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Duty cycle modulation of control pulses, e.g. VHS-CTL-coding systems, RAPID-time code, VASS- or VISS-cue signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B27/325" definition-exists="false" ipc-concordant="G11B27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Subcodes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B27/326" definition-exists="false" ipc-concordant="G11B27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/326</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used signal is a video-frame or a video-field (P.I.P.)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B27/327" definition-exists="false" ipc-concordant="G11B27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/327</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Table of contents</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B27/328" definition-exists="false" ipc-concordant="G11B27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/328</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on a tape [TTOC]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B27/329" definition-exists="false" ipc-concordant="G11B27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/329</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on a disc [VTOC]</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="9" additional-only="false" sort-key="G11B27/34" definition-exists="false" ipc-concordant="G11B27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indicating arrangements </text><reference><text>indicating measured values in general <class-ref scheme="cpc">G01D</class-ref> </text><CPC-specific-text><text>indicating means incorporated in magazine or cassette <class-ref scheme="cpc">G11B23/046</class-ref> and <class-ref scheme="cpc">G11B23/0875</class-ref></text></CPC-specific-text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B27/36" definition-exists="false" ipc-concordant="G11B27/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B27/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monitoring, i.e. supervising the progress of recording or reproducing </text><CPC-specific-text><reference><text>for digital recording <class-ref scheme="cpc">G11B20/00</class-ref> and s.gr.; for monitoring, testing or measuring of TV recorders of the type covered by <class-ref scheme="cpc">H04N5/76</class-ref> and subgroups, <u>see</u> <class-ref scheme="cpc">H04N17/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G11B31/00" definition-exists="true" ipc-concordant="G11B31/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>G11B31/00</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>Arrangements for the associated working of recording or reproducing apparatus with related apparatus </text><reference><text>with cameras or projectors <class-ref scheme="cpc">G03B31/00</class-ref> </text><CPC-specific-text><text>; recording/reproducing of music for electrophonic musical instruments <class-ref scheme="cpc">G10H1/0033</class-ref>; automatic arrangements for answering calls or for recording messages for absent subscribers <class-ref scheme="cpc">H04M1/64</class-ref>; telephonic communication systems adapted for combination with dictation recording and playback systems <class-ref scheme="cpc">H04M11/10</class-ref>; connection of TV recorder with other related apparatus, e.g. TV camera or receiver, in which the TV signal is significantly involved <class-ref scheme="cpc">H04N</class-ref>, e.g. <class-ref scheme="cpc">H04N23/00</class-ref>, <class-ref scheme="cpc">H04N5/765</class-ref>; combination of radio or TV with other apparatus, e.g. with vehicles <class-ref scheme="cpc">H05K11/00</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B31/003" definition-exists="false" ipc-concordant="G11B31/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B31/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with radio receiver</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="G11B31/006" definition-exists="false" ipc-concordant="G11B31/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B31/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with video camera or receiver</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="G11B31/02" definition-exists="false" ipc-concordant="G11B31/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B31/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with automatic musical instruments</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="G11B33/00" definition-exists="true" ipc-concordant="G11B33/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B33/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Constructional parts, details or accessories not provided for in the 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="G11B33/005" definition-exists="false" ipc-concordant="G11B33/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for locking the disc or cassette receiving slot, e.g. dummy cassettes locked in the slot</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="G11B33/02" definition-exists="false" ipc-concordant="G11B33/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G11B33/02</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Cabinets</text></title-part><title-part><text>Cases</text></title-part><title-part><text>Stands</text></title-part><title-part><text>Disposition of apparatus therein or thereon</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B33/022" definition-exists="false" ipc-concordant="G11B33/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cases</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="G11B33/025" definition-exists="false" ipc-concordant="G11B33/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Portable cases</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="G11B33/027" definition-exists="false" ipc-concordant="G11B33/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Covers </text><reference><text><class-ref scheme="cpc">G11B33/022</class-ref> takes precedence; with means for guiding the record carrier <class-ref scheme="cpc">G11B17/34</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="G11B33/04" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>modified to store record carriers </text><CPC-specific-text><reference><text>containers, storing means adapted for cooperation with the recording or reproducing apparatus <class-ref scheme="cpc">G11B23/02</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B33/0405" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for storing discs </text><reference><text>anti-theft cases with locking means <class-ref scheme="cpc">E05B73/0023</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="G11B33/0411" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0411</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Single disc boxes </text><reference><text><class-ref scheme="cpc">G11B33/0461</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B33/0416" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for disc cartridges</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B33/0422" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for discs without cartridge</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B33/0427" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising centre hole locking means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B33/0433" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple disc containers </text><reference><text><class-ref scheme="cpc">G11B33/0461</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B33/0438" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0438</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for disc cartridges</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B33/0444" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0444</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for discs without cartridge</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B33/045" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising centre hole locking 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="12" additional-only="false" sort-key="G11B33/0455" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for single disc boxes</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="G11B33/0461" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0461</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Disc storage racks</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="G11B33/0466" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for disc cartridges</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G11B33/0472" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for discs without cartridge</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G11B33/0477" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0477</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising centre hole locking 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="12" additional-only="false" sort-key="G11B33/0483" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for single disc boxes</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="G11B33/0488" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0488</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in boxes or containers comprising additional sound reproducing or activating means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G11B33/0494" definition-exists="false" ipc-concordant="G11B33/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/0494</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>packages made by folding</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B33/06" definition-exists="false" ipc-concordant="G11B33/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combined with other apparatus having a different main function</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="G11B33/08" definition-exists="false" ipc-concordant="G11B33/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Insulation or absorption of undesired vibrations or sounds</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="G11B33/10" definition-exists="false" ipc-concordant="G11B33/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indicating arrangements</text></title-part><title-part><text>Warning arrangements </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G11B15/04</class-ref>, <class-ref scheme="cpc">G11B19/04</class-ref>, <class-ref scheme="cpc">G11B27/34</class-ref>, <class-ref scheme="cpc">G11B27/36</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G11B33/12" definition-exists="false" ipc-concordant="G11B33/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Disposition of constructional parts in the apparatus, e.g. of power supply, of modules</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B33/121" definition-exists="false" ipc-concordant="G11B33/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the apparatus comprising a single recording/reproducing device</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="G11B33/122" definition-exists="false" ipc-concordant="G11B33/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for providing electrical connections, e.g. connectors, cables, switches</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="G11B33/123" definition-exists="false" ipc-concordant="G11B33/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting arrangements of constructional parts onto a chassis</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="G11B33/124" definition-exists="false" ipc-concordant="G11B33/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/124</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the single recording/reproducing device, e.g. disk drive, onto a chassis</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B33/125" definition-exists="false" ipc-concordant="G11B33/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the apparatus comprising a plurality of recording/reproducing devices, e.g. modular arrangements, arrays of disc drives</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="G11B33/126" definition-exists="false" ipc-concordant="G11B33/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for providing electrical connections, e.g. connectors, cables, switches</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="G11B33/127" definition-exists="false" ipc-concordant="G11B33/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting arrangements of constructional parts onto a chassis</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="G11B33/128" definition-exists="false" ipc-concordant="G11B33/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/128</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the plurality of recording/reproducing devices, e.g. disk drives, onto a chassis</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="G11B33/14" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reducing influence of physical parameters, e.g. temperature change, moisture, dust</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B33/1406" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/1406</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reducing the influence of the temperature</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="G11B33/1413" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/1413</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by fluid cooling</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="G11B33/142" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/142</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by air cooling</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="G11B33/1426" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/1426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by cooling plates, e.g. fins</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="G11B33/1433" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/1433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by reducing the effects of the thermal expansion</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="G11B33/144" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/144</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by detection, control, regulation of the temperature</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G11B33/1446" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/1446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reducing contamination, e.g. by dust, debris</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="G11B33/1453" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/1453</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by moisture</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="G11B33/146" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>constructional details of filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G11B33/1466" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/1466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>sealing gaskets, </text><reference><text>gasket in general <class-ref scheme="cpc">F16J</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="G11B33/1473" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/1473</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of/from bearings</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="G11B33/148" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/148</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reducing friction, adhesion, drag</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="G11B33/1486" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/1486</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control/regulation of the pressure, e.g. the pressure inside the housing of a drive</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="G11B33/1493" definition-exists="false" ipc-concordant="G11B33/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B33/1493</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electro-Magnetic Interference [EMI] or Radio Frequency Interference [RFI] shielding; grounding of static charges</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="G11B209/00" date-revised="2013-01-01" status="published"><classification-symbol>G11B2209/00</classification-symbol>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="G11B209/00" 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>G11B2209/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recording or reproducing using a method not covered elsewhere in this subclass</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11B209/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2209/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>transducing on or investigating record carriers or information recording transducers or systems by using near-field interactions</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="G11B220/00" 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>G11B2220/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Record carriers by type</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11B220/17" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Card-like record carriers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11B220/20" 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>G11B2220/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Disc-shaped record carriers</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B220/21" 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>G11B2220/21</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised in that the disc is of read-only, rewritable, or recordable type</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B220/211" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>G11B2220/211</classification-symbol><class-title date-revised="2022-08-01"><title-part><text>Discs having both read-only and rewritable or recordable areas containing application data</text></title-part><title-part><text>Partial ROM 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="G11B220/213" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/213</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Read-only discs</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="G11B220/215" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/215</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recordable discs</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B220/216" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/216</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rewritable discs</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="G11B220/218" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/218</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Write-once discs</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="G11B220/23" 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>G11B2220/23</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised in that the disc has a specific layer structure</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B220/232" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/232</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Double-sided discs, i.e. two recording layers accessed from opposite sides</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="G11B220/235" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/235</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilayer discs, i.e. multiple recording layers accessed from the same side</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B220/237" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/237</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having exactly two recording layers</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B220/25" 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>G11B2220/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterised in that the disc is based on a specific recording technology</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B220/2504" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2504</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Holographic discs</text></title-part><title-part><text>Holographic digital data storage [HDDS]</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="G11B220/2508" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2508</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magnetic discs</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B220/2512" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2512</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Floppy disks</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="G11B220/2516" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2516</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hard disks</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="G11B220/252" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/252</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Patterned or quantised magnetic media, i.e. bits are stored in predefined single domain elements</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="G11B220/2525" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2525</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magneto-optical [MO] discs</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B220/2529" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2529</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mini-discs</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="G11B220/2533" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2533</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>MO disc using magnetic super resolution, i.e., the magnetic mark is smaller than the laser spot size</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="G11B220/2537" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2537</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical discs</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B220/2541" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2541</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Blu-ray discs</text></title-part><title-part><text>Blue laser DVR discs</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="G11B220/2545" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2545</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>CDs</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B220/255" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/255</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>CD-I, i.e. CD-interactive</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B220/2554" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2554</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>CD-V [CD-Video], CDV, or CD+V, as defined in IEC 61104</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B220/2558" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2558</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>CD-XA format, i.e. eXtended architecture extension of the CD-ROM standard</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B220/2562" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2562</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>DVDs [digital versatile discs]</text></title-part><title-part><text>Digital video discs</text></title-part><title-part><text>MMCDs</text></title-part><title-part><text>HDCDs</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B220/2566" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2566</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>DVDs belonging to the minus family, i.e. -R, -RW, -VR</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B220/257" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/257</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>DVDs belonging to the plus family, i.e. +R, +RW, +VR</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G11B220/2575" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2575</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>DVD-RAMs</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B220/2579" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2579</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>HD-DVDs [high definition DVDs]</text></title-part><title-part><text>AODs [advanced optical discs]</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="G11B220/2583" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2583</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein two standards are used on a single disc, e.g. one DVD section and one CD section</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="G11B220/2587" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2587</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Laser Discs</text></title-part><title-part><text>Optical disc using analog recording</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="G11B220/2591" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2591</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>SFFO discs, i.e. small form factor optical discs</text></title-part><title-part><text>Portable blue</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="G11B220/2595" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/2595</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Super-resolution optical discs, i.e. optical discs wherein the size of marks is below the optical diffraction limit</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11B220/40" 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>G11B2220/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combinations of multiple record carriers</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B220/41" 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>G11B2220/41</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Flat as opposed to hierarchical combination, e.g. library of tapes or discs, CD changer, or groups of record carriers that together store one title</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B220/412" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/412</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Distributed storage methods, i.e. the system may autonomously determine for a storage device that provides enough storage capacity for recording</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="G11B220/415" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/415</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Redundant array of inexpensive disks [RAID] systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B220/417" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/417</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Redundant array of inexpensive tapes [RAIT] systems</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="G11B220/45" 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>G11B2220/45</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hierarchical combination of record carriers, e.g. HDD for fast access, optical discs for long term storage or tapes for backup</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B220/455" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/455</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>said record carriers being in one device and being used as primary and secondary/backup media, e.g. HDD-DVD combo device, or as source and target media, e.g. PC and portable player</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="G11B220/60" 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>G11B2220/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Solid state media </text><reference><text>details of solid state memory devices <class-ref scheme="cpc">G11C</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="G11B220/61" 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>G11B2220/61</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein solid state memory is used for storing A/V content </text><reference><text>storing computer data in solid state memories <class-ref scheme="cpc">G06F</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="G11B220/63" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/63</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein solid state memory is used as a supplementary storage medium to store auxiliary data for detecting or correcting errors on a main storage medium</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="G11B220/65" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/65</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein solid state memory is used for storing indexing information or metadata</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B220/652" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/652</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>said memory being attached to the recording medium</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G11B220/655" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/655</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Memory in cassette [MIC]</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="G11B220/657" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/657</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Memory in disc [MID]</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11B220/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indexing information stored in optical or magnetic or other strip attached to cassette or disc, e.g. barcodes attached to a recording medium</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G11B220/90" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tape-like record carriers</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G11B220/91" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/91</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Helical scan format, wherein tracks are slightly tilted with respect to tape direction, e.g. VHS, DAT, DVC, AIT or exabyte</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B220/913" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/913</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Digital audio tape [DAT] format</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="G11B220/916" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/916</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Digital data storage [DDS] format</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="G11B220/93" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/93</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Longitudinal format, wherein tracks are in the direction of the tape, read with a static head, e.g. DCC</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="G11B220/95" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/95</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Serpentine format, wherein a single track or group of tracks traverses the tape plural times from one end to the other</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G11B220/953" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/953</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Digital linear tape [DLT] format</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="G11B220/956" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G11B2220/956</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Linear tape open [LTO] format</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item></class-scheme> |