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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 [4]
H04H
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BROADCAST COMMUNICATION (multiplex communication H04J; pictorial communication aspects of broadcast systems H04N)
H04J
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MULTIPLEX COMMUNICATION (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)
H04K
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SECRET COMMUNICATIONJAMMING OF COMMUNICATION
H04L
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TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) [4]
H04M
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TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
H04N
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PICTORIAL COMMUNICATION, e.g. TELEVISION [4]
H04Q
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SELECTING (switches, relays, selectors H01H;  wireless communication networks H04W) [1, 2009.01]
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 20/88; multiplex systems in general H04J) [3]
H04W
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WIRELESS COMMUNICATION NETWORKS [2009.01]
H04W 4/00
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Services or facilities specially adapted for wireless communication networks [2009.01]
H04W 8/00
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Network data management [2009.01]
H04W 12/00
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Security arrangements, e.g. access security or fraud detectionAuthentication, e.g. verifying user identity or authorisationProtecting privacy or anonymity [2009.01]
H04W 16/00
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Network planning, e.g. coverage or traffic planning toolsNetwork deployment, e.g. resource partitioning or cell structures [2009.01]
H04W 24/00
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Supervisory, monitoring or testing arrangements [2009.01]
H04W 28/00
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Network traffic or resource management [2009.01]
H04W 36/00
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Handoff or reselecting arrangements [2009.01]
H04W 40/00
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Communication routing or communication path finding [2009.01]
H04W 48/00
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Access restrictionNetwork selectionAccess point selection [2009.01]
H04W 52/00
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Power management, e.g. TPC [Transmission Power Control], power saving or power classes [2009.01]
H04W 56/00
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Synchronisation arrangements [2009.01]
H04W 60/00
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Registration, e.g. affiliation to networkDe-registration, e.g. terminating affiliation [2009.01]
H04W 64/00
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Locating users or terminals for network management purposes, e.g. mobility management [2009.01]
H04W 68/00
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Notification of users, e.g. alerting for incoming communication or change of service [2009.01]
H04W 72/00
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Local resource management, e.g. selection or allocation of wireless resources or wireless traffic scheduling [2009.01]
H04W 74/00
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Wireless channel access, e.g. scheduled or random access [2009.01]
H04W 76/00
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Connection management, e.g. connection set-up, manipulation or release [2009.01]
H04W 80/00
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Wireless network protocols or protocol adaptations to wireless operation, e.g. WAP [Wireless Application Protocol] [2009.01]
H04W 84/00
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Network topologies [2009.01]
H04W 88/00
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Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices [2009.01]
H04W 92/00
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Interfaces specially adapted for wireless communication networks [2009.01]
H04W 99/00
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Subject matter not provided for in other groups of this subclass [2009.01]
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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