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A
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SECTION A — HUMAN NECESSITIES
B
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SECTION B — PERFORMING OPERATIONSTRANSPORTING
C
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SECTION C — CHEMISTRYMETALLURGY
D
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SECTION D — TEXTILESPAPER
E
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SECTION E — FIXED CONSTRUCTIONS
F
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SECTION F — MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
G
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SECTION G — PHYSICS
G01
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INSTRUMENTS
G01
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MEASURINGTESTING
G02
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OPTICS (making optical elements or apparatus B24B, B29D 11/00, C03, or other appropriate subclasses or classes; materials per se, see the relevant places, e.g. C03B, C03C)
G03
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PHOTOGRAPHYCINEMATOGRAPHYANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVESELECTROGRAPHYHOLOGRAPHY (reproduction of pictures or patterns by scanning and converting into electrical signals H04N) [4]
G04
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HOROLOGY
G05
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CONTROLLINGREGULATING
G06
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COMPUTINGCALCULATINGCOUNTING (score computers for games A63B 71/06, A63D 15/20, A63F 1/18; combinations of writing implements with computing devices B43K 29/08)
G07
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CHECKING-DEVICES
G08
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SIGNALLING (indicating or display devices per seG09F; transmission of pictures H04N)
G09
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EDUCATINGCRYPTOGRAPHYDISPLAYADVERTISINGSEALS
G10
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MUSICAL INSTRUMENTSACOUSTICS
G11
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INFORMATION STORAGE
G11B
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INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D 9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K 1/18;  circuits for coupling output of reproducer to radio receiver H04B 1/20;  gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)
G11B 3/00
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Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pitsReproducing by mechanical sensingRecord carriers therefor (G11B 11/00 takes precedence)
G11B 5/00
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Recording by magnetisation or demagnetisation of a record carrierReproducing by magnetic meansRecord carriers therefor (G11B 11/00 takes precedence) [4]
G11B 7/00
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Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower powerRecord carriers therefor (G11B 11/00, G11B 13/00 take precedence) [4, 7]
G11B 7/002
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Recording, reproducing or erasing systems characterised by the shape of the carrier [7]
G11B 7/0025
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. . with cylinders or cylinder-like carriers, e.g. truncated cones [7]
G11B 7/003
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. . with webs, e.g. belts, spooled tapes or films of quasi-infinite extent [7]
G11B 7/0033
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. . with cards [7]
G11B 7/0037
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. . with discs [7]
G11B 7/004
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Recording, reproducing or erasing methodsRead, write or erase circuits therefor [7]
G11B 7/0045
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. . Recording (G11B 7/006, G11B 7/0065 take precedence) [7]
G11B 7/005
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. . Reproducing (G11B 7/0065 takes precedence) [7]
G11B 7/0055
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. . Erasing (G11B 7/006, G11B 7/0065 take precedence) [7]
G11B 7/006
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. . Overwriting (G11B 7/0065 takes precedence) [7]
G11B 7/0065
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. . Recording, reproducing or erasing by using optical interference patterns, e.g. holograms [7]
G11B 7/007
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Arrangement of the information on the record carrier, e.g. form of tracks [4]
G11B 7/013
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. . for discrete information, i.e. where each information unit is stored in a distinct location [4]
G11B 7/08
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Disposition or mounting of heads or light sources relatively to record carriers
G11B 7/085
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. . with provision for moving the light beam into, or out of, its operative position (modulating by information signals G11B 7/12) [4]
G11B 7/09
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. . 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 [4]
G11B 7/095
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. . . specially adapted for discs, e.g. for compensation of eccentricity or wobble [4]
G11B 7/10
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. . Interchangeable mountings, e.g. for replacement of head without readjustment
G11B 7/12
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Heads
G11B 7/125
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. . Optical beam sources thereforModulators, e.g. means for controlling the size or intensity of the optical spot or of the optical trace [4]
G11B 7/13
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. . Optical detectors therefor [4]
G11B 7/135
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. . Means for guiding the beam from source to record carrier or from record carrier to detector [4]
G11B 7/14
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. . adapted to record on, or to reproduce from, more than one track simultaneously (G11B 7/20 takes precedence)
G11B 7/16
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. . using filters, e.g. colour filter
G11B 7/18
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. . using optical slits
G11B 7/20
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. . Dual-recording arrangements, i.e. in which the information is recorded in two different forms simultaneously on the same or related tracks, e.g. recording instantaneous and mean values (sound-recording combined with cinematography G03C 5/14)
G11B 7/22
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. . Apparatus or processes specially adapted for the manufacture of heads, e.g. assembly
G11B 7/24
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Record carriers characterised by the selection of the material or by the structure or form (characterised by the arrangement of information on the carrier G11B 7/007) [4]
G11B 7/241
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. . characterised by the selection of the material [2006.01]
G11B 7/242
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. . . of recording layers [2006.01]
G11B 7/243
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. . . . comprising inorganic material only, e.g. ablative layers [2006.01]
G11B 7/244
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. . . . comprising organic material only [2006.01]
G11B 7/245
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. . . . . containing a polymeric component [2006.01]
G11B 7/246
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. . . . . containing dyes [2006.01]
G11B 7/247
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. . . . . . Methine or polymethine dyes [2006.01]
G11B 7/248
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. . . . . . PorphinesAzaporphines, e.g. phthalocyanines [2006.01]
G11B 7/249
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. . . . . containing organo-metallic compounds (G11B 7/246 takes precedence) [2006.01]
G11B 7/25
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. . . . . containing liquid crystals [2006.01]
G11B 7/251
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. . . . comprising inorganic material dispersed in an organic matrix [2006.01]
G11B 7/252
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. . . of layers other than recording layers [2006.01]
G11B 7/253
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. . . . Base layers [2006.01]
G11B 7/254
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. . . . Protective topcoat layers [2006.01]
G11B 7/256
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. . . . Layers improving adhesion between layers [2006.01]
G11B 7/257
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. . . . Layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers [2006.01]
G11B 7/258
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. . . . Reflective layers [2006.01]
G11B 7/26
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. . Apparatus or processes specially adapted for the manufacture of record carriers
G11B 7/28
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Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers using optical sensing means
G11B 7/30
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Rewritable carriers (G11B 7/24 takes precedence) [7]
G11B 9/00
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Recording or reproducing using a method or means not covered by one of the main groups G11B 3/00-G11B 7/00Record carriers therefor (G11B 11/00 takes precedence) [4]
G11B 11/00
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Recording on, or reproducing from, the same record carrier wherein for these two operations the methods or means are covered by different main groups of groups G11B 3/00-G11B 7/00 or by different subgroups of group G11B 9/00Record carriers therefor
G11B 13/00
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Recording simultaneously or selectively by methods or means covered by different main groupsRecord carriers thereforReproducing simultaneously or selectively therefrom [1, 7]
G11B 15/00
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Driving, starting or stopping record carriers of filamentary or web formDriving both such record carriers and headsGuiding such record carriers or containers thereforControl thereofControl of operating function (driving or guiding heads G11B 3/00-G11B 7/00, G11B 21/00) [2]
G11B 17/00
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Guiding record carriers not specifically of filamentary or web form, or of supports therefor (guiding cards or sheets G06K 13/00)
G11B 19/00
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Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports thereforControl thereofControl of operating function
G11B 20/00
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Signal processing not specific to the method of recording or reproducingCircuits therefor [4]
G11B 21/00
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Head arrangements not specific to the method of recording or reproducing
G11B 23/00
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Record carriers not specific to the method of recording or reproducingAccessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus [4]
G11B 25/00
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Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing [4]
G11B 27/00
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EditingIndexingAddressingTiming or synchronisingMonitoringMeasuring tape travel [2, 4]
G11B 31/00
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Arrangements for the associated working of recording or reproducing apparatus with related apparatus (with cameras or projectors G03B 31/00) [1, 7]
G11B 33/00
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Constructional parts, details or accessories not provided for in the other groups of this subclass [4]
G11C
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STATIC STORES (information storage based on relative movement between record carrier and transducer G11B; semiconductor devices for storage H01L, e.g. H01L 27/108-H01L 27/115; pulse technique in general H03K, e.g. electronic switches H03K 17/00)
G12
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INSTRUMENT DETAILS
G21
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NUCLEONICS
G21
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NUCLEAR PHYSICSNUCLEAR ENGINEERING
G99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
H
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SECTION H — ELECTRICITY

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