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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
G03
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PHOTOGRAPHYCINEMATOGRAPHYANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVESELECTROGRAPHYHOLOGRAPHY [4]
G04
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HOROLOGY
G05
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CONTROLLINGREGULATING
G06
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COMPUTINGCALCULATINGCOUNTING
G07
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CHECKING-DEVICES
G08
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SIGNALLING
G09
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EDUCATINGCRYPTOGRAPHYDISPLAYADVERTISINGSEALS
G10
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MUSICAL INSTRUMENTSACOUSTICS
G10B
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ORGANS, HARMONIUMS OR LIKE WIND-ACTUATED MUSICAL INSTRUMENTS (non-musical aspects of musical toy instruments A63H 5/00; mouth organs G10D 7/12; accordions, concertinas or the like or keyboards therefor G10D 11/00; automatic wind-actuated instruments G10F 1/12)
G10C
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PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS (non-musical aspects of toy pianos A63H 5/00; automatic pianos with or without keyboards G10F 1/02, G10F 1/04; combination instruments incorporating an automatic piano G10F 1/22; details or accessories of automatic pianos G10F 5/00)
G10D
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STRINGED MUSICAL INSTRUMENTSWIND-ACTUATED MUSICAL INSTRUMENTSACCORDIONS OR CONCERTINASPERCUSSION MUSICAL INSTRUMENTSMUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR (non-musical aspects of musical toy instruments A63H 5/00; organs, harmoniums or like wind-actuated instruments G10B; pianos, harpsichords, spinets or similar stringed musical instruments with one or more keyboards G10C; automatic musical instruments G10F; electrophonic musical instruments G10H; instruments in which the tones are generated by electromechanical means or electronic generators, or in which the tones are synthesised from a data store G10H)
G10F
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AUTOMATIC MUSICAL INSTRUMENTS (non-musical aspects of musical toy instruments A63H 5/00; arrangements for the associated working of recording or reproducing apparatus with automatic musical instruments G11B 31/02)
G10G
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AIDS FOR MUSICSUPPORTS FOR MUSICAL INSTRUMENTSOTHER AUXILIARY DEVICES OR ACCESSORIES FOR MUSIC OR MUSICAL INSTRUMENTS (music stands A47B; non-musical aspects of musical toy instruments A63H 5/00; metronomes G04F 5/02; teaching music G09B 15/00)
G10H
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ELECTROPHONIC MUSICAL INSTRUMENTSINSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
G10K
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SOUND-PRODUCING DEVICES (sound-producing toys A63H 5/00) METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERALACOUSTICS NOT OTHERWISE PROVIDED FOR [6]
G10K 1/00
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Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs (combinations with clocks or watches G04B, G04C; multi-toned musical instruments G10D 13/08; automatic carillons G10F 1/10)
G10K 3/00
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Rattles or like noise-producing devices
G10K 5/00
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Whistles
G10K 7/00
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Sirens
G10K 9/00
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Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers (loudspeakers or like acoustic electromechanical transducers H04R)
G10K 11/00
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Methods or devices for transmitting, conducting or directing sound in generalMethods or devices for protecting against, or for damping, noise or other acoustic waves in general
G10K 11/02
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Mechanical acoustic impedancesImpedance matching, e.g. by hornsAcoustic resonators [3]
G10K 11/04
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. . Acoustic filters [3]
G10K 11/08
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Non-electric sound-amplifying devices, e.g. non-electric megaphones (amplifying by horns G10K 11/02; amplifying by focusing G10K 11/26)
G10K 11/16
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Methods or devices for protecting against, or for damping, noise or other acoustic waves in general (G10K 11/36 takes precedence) [3]
G10K 11/162
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. . Selection of materials [6]
G10K 11/165
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. . . Particles in a matrix [6]
G10K 11/168
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. . . Plural layers of different materials, e.g. sandwiches [6]
G10K 11/172
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. . using resonance effects [6]
G10K 11/175
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. . using interference effectsMasking sound [6]
G10K 11/178
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. . . by electro-acoustically regenerating the original acoustic waves in anti-phase [6]
G10K 11/18
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Methods or devices for transmitting, conducting or directing sound (G10K 11/02, G10K 11/36 take precedence; medical stethoscopes A61B 7/02) [3]
G10K 11/20
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. . Reflecting arrangements (G10K 11/28 takes precedence) [3]
G10K 11/22
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. . for conducting sound through hollow pipes, e.g. speaking tubes [3]
G10K 11/24
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. . for conducting sound through solid bodies, e.g. wires [3]
G10K 11/26
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. . Sound-focusing or directing, e.g. scanning [3]
G10K 11/28
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. . . using reflection, e.g. parabolic reflectors [3]
G10K 11/30
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. . . using refraction, e.g. acoustic lenses [3]
G10K 11/32
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. . . characterised by shape of the source [3]
G10K 11/34
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. . . using electrical steering of transducer arrays, e.g. beam steering [3]
G10K 11/35
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. . . using mechanical steering of transducers [6]
G10K 11/36
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Devices for manipulating acoustic surface waves (electro-acoustic amplifiers H03F 13/00; networks comprising electro-acoustic elements H03H 9/00) [3]
G10K 13/00
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Cones, diaphragms, or the like, for emitting or receiving sound in general (for electromechanical transducers H04R 7/00)
G10K 15/00
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Acoustics not otherwise provided for [4]
G10L
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SPEECH ANALYSIS OR SYNTHESISSPEECH RECOGNITIONSPEECH OR VOICE PROCESSINGSPEECH OR AUDIO CODING OR DECODING [4]
G11
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INFORMATION STORAGE
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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