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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
H
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SECTION H — ELECTRICITY
H01
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BASIC ELECTRIC ELEMENTS
H02
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GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H03
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BASIC ELECTRONIC CIRCUITRY
H04
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ELECTRIC COMMUNICATION TECHNIQUE
H04B
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TRANSMISSION (transmission systems for measured values, control or similar signals G08C; speech analysis or synthesis G10L; coding, decoding or code conversion, in general H03M; broadcast communication H04H; multiplex systems H04J; secret communication H04K; transmission of digital information H04L) [4]
H04H
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BROADCAST COMMUNICATION (transmission in general H04B; multiplex communication H04J)
H04J
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MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L 5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N 7/08; in exchanges H04Q 11/00; stereophonic systems H04S)
H04K
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SECRET COMMUNICATIONJAMMING OF COMMUNICATION
H04L
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TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (typewriters B41J; order telegraphs, fire or police telegraphs G08B; visual telegraphy G08B, G08C; teleautographic systems G08C; ciphering or deciphering apparatus per seG09C; coding, decoding or code conversion, in general H03M; arrangements common to telegraphic and telephonic communication H04M; selecting H04Q) [4]
H04M
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TELEPHONIC COMMUNICATION (counting mechanisms G06M; circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08; reels or other take-up devices for cords H02G 11/00; multiplex transmission between switching centres H04J; selecting arrangements H04Q; loudspeakers, microphones, gramophone pick-ups or like electromechanical transducers H04R)
H04N
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PICTORIAL COMMUNICATION, e.g. TELEVISION (measuring, testing G01; systems for autographic writing, e.g. writing telegraphy, which involve following an outline G08; information storage based on relative movement between record carrier and transducer G11B; coding, decoding or code conversion, in general H03M; broadcast distribution or the recording of use made thereof H04H) [4]
H04N 1/00
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Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmissionDetails thereof [3, 4]
H04N 3/00
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Scanning details of television systemsCombination thereof with generation of supply voltages [4]
H04N 3/02
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by optical-mechanical means only (H04N 3/36 takes precedence; optical scanning systems in general G02B 26/10) [2]
H04N 3/04
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. . having a moving aperture
H04N 3/06
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. . having a moving lens or other refractor
H04N 3/08
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. . having a moving reflector
H04N 3/09
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. . . for electromagnetic radiation in the invisible region, e.g. infra-red [4]
H04N 3/10
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by means not exclusively optical-mechanical (H04N 3/36 takes precedence; devices or arrangements for the electro-, magneto- or acousto-optical modulation or deflection of light beams G02F) [2]
H04N 3/12
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. . by switched stationary formation of lamps, photocells, or light relays
H04N 3/14
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. . by means of electrically scanned solid-state devices
H04N 3/15
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. . . for picture signal generation [3]
H04N 3/16
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. . by deflecting electron beam in cathode-ray tube (producing sawtooth waveforms H03K 4/00)
H04N 3/18
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. . . Generation of supply voltages, in combination with electron beam deflecting [4]
H04N 3/185
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. . . . Maintaining dc voltage constant (regulation of dc voltage in general G05F) [4]
H04N 3/19
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. . . . Arrangements or assemblies in supply circuits for the purpose of withstanding high voltages [3]
H04N 3/20
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. . . Prevention of damage to cathode-ray tubes in event of failure of scanning
H04N 3/22
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. . . Circuits for controlling dimensions, shape or centering of picture on screen
H04N 3/223
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. . . . Controlling dimensions (by maintaining the cathode-ray tube high voltage constant H04N 3/185) [4]
H04N 3/227
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. . . . Centering [4]
H04N 3/23
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. . . . Distortion correction, e.g. for pincushion distortion correction, S-correction [4]
H04N 3/233
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. . . . . using active elements [4]
H04N 3/237
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. . . . . using passive elements [4]
H04N 3/24
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. . . Blanking circuits
H04N 3/26
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. . . Modifications of scanning arrangements to improve focusing (focusing circuits in general H01J)
H04N 3/27
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. . . Circuits special to multi-standard receivers (circuitry of multi-standard receivers in general H04N 5/46) [3, 4]
H04N 3/28
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. . producing multiple scanning, i.e. using more than one spot at the same time
H04N 3/30
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. . otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
H04N 3/32
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. . . Velocity varied in dependence upon picture information
H04N 3/34
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. . . Elemental scanning area oscillated rapidly in direction transverse to main scanning direction
H04N 3/36
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Scanning of motion picture films, e.g. for telecine [2]
H04N 3/38
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. . with continuously moving film [4]
H04N 3/40
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. . with intermittently moving film [4]
H04N 5/00
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Details of television systems (scanning details or combination thereof with generation of supply voltages H04N 3/00; specially adapted for colour television H04N 9/00) [4]
H04N 7/00
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Television systems (details H04N 3/00, H04N 5/00; specially adapted for colour television H04N 11/00; stereoscopic television systems H04N 13/00) [4]
H04N 9/00
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Details of colour television systems [4]
H04N 11/00
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Colour television systems (details H04N 9/00; stereoscopic H04N 15/00) [4]
H04N 13/00
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Stereoscopic television systemsDetails thereof (specially adapted for colour television H04N 15/00) [4]
H04N 15/00
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Stereoscopic colour television systemsDetails thereof [4]
H04N 17/00
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Diagnosis, testing or measuring for television systems or their details [4]
H04N 101/00
Indexing scheme associated with groups H04N 1/00-H04N 17/00, relating to still video cameras. [6]
H04N 101/00
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Still video cameras [6]
H04Q
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SELECTING (switches, relays, selectors H01H; electronic switches H03K 17/00)
H04R
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LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERSDEAF-AID SETSPUBLIC ADDRESS SYSTEMS (generating mechanical vibrations in general B06B; transducers for measuring particular variables G01; transducers in clocks G04; producing sounds with frequency not determined by supply frequency G10K; transducers in recording or reproducing heads G11B; transducers in motors H02) [6]
H04S
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STEREOPHONIC SYSTEMS (information storage on discs or tapes G11B; broadcast systems for the distribution of stereophonic information H04H 5/00; multiplex systems in general H04J) [3]
H05
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ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]

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