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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 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 7/01
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Conversion of standards [4]
H04N 7/015
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High-definition television systems [6]
H04N 7/025
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Systems for transmission of digital non-picture data, e.g. of text during the active part of a television frame [6]
H04N 7/03
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. . Subscription systems therefor [6]
H04N 7/035
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. . Circuits for the digital non-picture data signal, e.g. for slicing of the data signal, for regeneration of the data-clock signal, for error detection or correction of the data signal [6]
H04N 7/04
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Systems for the transmission of one television signal, i.e. both picture and sound, by a single carrier [4]
H04N 7/045
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. . the carrier being frequency modulated [6]
H04N 7/06
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Systems for the simultaneous transmission of one television signal, i.e. both picture and sound, by more than one carrier [4]
H04N 7/08
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Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band [4, 6]
H04N 7/081
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. . the additional information signals being transmitted by means of a subcarrier [6]
H04N 7/083
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. . with signal insertion during the vertical and the horizontal blanking interval [6]
H04N 7/084
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. . with signal insertion during the horizontal blanking interval [6]
H04N 7/085
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. . . the inserted signal being digital [6]
H04N 7/087
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. . with signal insertion during the vertical blanking interval [4]
H04N 7/088
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. . . the inserted signal being digital [6]
H04N 7/10
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Adaptations for transmission by electrical cable (H04N 7/12 takes precedence) [4]
H04N 7/12
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Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal (H04N 7/24 takes precedence; high-definition television systems H04N 7/015) [4]
H04N 7/14
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Systems for two-way working (H04N 7/173 takes precedence) [4]
H04N 7/15
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. . Conference systems (telephonic conference arrangements H04M 3/56) [5]
H04N 7/16
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Secrecy systemsSubscription systems
H04N 7/167
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. . Systems rendering the television signal unintelligible and subsequently intelligible [4]
H04N 7/169
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. . . Systems operating in the time domain of the television signal [6]
H04N 7/171
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. . . Systems operating in the amplitude domain of the television signal [6]
H04N 7/173
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. . with two-way working, e.g. subscriber sending a programme selection signal [4]
H04N 7/18
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Closed-circuit television systems, i.e. systems in which the signal is not broadcast
H04N 7/20
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Adaptations for transmission via a GHz frequency band, e.g. via satellite [4]
H04N 7/22
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Adaptations for optical transmission [4]
H04N 7/24
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Systems for the transmission of television signals using pulse code modulation [6]
H04N 7/26
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. . using bandwidth reduction (information reduction by code conversion in general H03M 7/30) [6]
H04N 7/28
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. . . using vector coding [6]
H04N 7/30
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. . . involving transform coding (H04N 7/50 takes precedence; digital computers for performing complex mathematical operations, e.g. domain transformation, G06F 17/14) [6]
H04N 7/32
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. . . involving predictive coding (H04N 7/48, H04N 7/50 take precedence) [6]
H04N 7/34
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. . . . using spatial prediction [6]
H04N 7/36
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. . . . using temporal prediction [6]
H04N 7/38
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. . . . involving delta modulation (systems using differential pulse code modulation in general H04B 14/06) [6]
H04N 7/40
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. . . . . adaptive [6]
H04N 7/42
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. . . . involving differential modulation (systems using differential pulse code modulation in general H04B 14/06) [6]
H04N 7/44
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. . . . . adaptive [6]
H04N 7/46
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. . . . using subsampling at the coder and sample restitution by interpolation at the coder or decoder [6]
H04N 7/48
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. . . involving pulse code modulation and predictive coding [6]
H04N 7/50
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. . . involving transform and predictive coding [6]
H04N 7/52
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. . Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal, a synchronising signal [6]
H04N 7/54
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. . . the signals being synchronous [6]
H04N 7/56
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. . . . Synchronising systems therefor [6]
H04N 7/58
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. . . involving more than one video signal [6]
H04N 7/60
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. . . the signals being asynchronous [6]
H04N 7/62
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. . . . Synchronising systems therefor [6]
H04N 7/64
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. . Systems for detection or correction of transmission errors (coding, decoding or code conversion for error detection or error correction in general H03M 13/00) [6]
H04N 7/66
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. . . using redundant codes [6]
H04N 7/68
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. . . using error concealment [6]
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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