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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
H02B
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BOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER (basic electric elements, their assembly, including the mounting in enclosures or on bases, or the mounting of covers thereon, see the subclasses for such elements, e.g. transformers H01F, switches, fuses H01H, line connectors H01R; installation of electric cables or lines, or of combined optical and electric cables or lines, or other conductors for supply or distribution H02G)
H02G
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INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES (insulated conductors or cables with arrangements for facilitating mounting or securing H01B 7/40; distribution points incorporating switches H02B; guiding telephone cords H04M 1/15; cable ducts or mountings for telephone or telegraph exchange installations H04Q 1/06)
H02H
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EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R 31/00, G08B; locating faults along lines G01R 31/08; emergency protective devices H01H)
H02J
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CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWERSYSTEMS FOR STORING ELECTRIC ENERGY (power supply circuits for apparatus for measuring X-radiation, gamma radiation, corpuscular radiation or cosmic radiation G01T 1/175; electric power supply circuits specially adapted for use in electronic time-pieces with no moving parts G04G 19/00; for digital computers G06F 1/18; for discharge tubes H01J 37/248; circuits or apparatus for the conversion of electric power, arrangements for control or regulation of such circuits or apparatus H02M; interrelated control of several motors, control of a prime-mover/generator combination H02P; control of high-frequency power H03L; additional use of power line or power network for transmission of information H04B)
H02J 1/00
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Circuit arrangements for dc mains or dc distribution networks
H02J 3/00
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Circuit arrangements for ac mains or ac distribution networks
H02J 3/01
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Arrangements for reducing harmonics or ripples (in converters H02M 1/12) [3]
H02J 3/02
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using a single network for simultaneous distribution of power at different frequenciesusing a single network for simultaneous distribution of ac power and of dc power
H02J 3/04
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for connecting networks of the same frequency but supplied from different sources
H02J 3/06
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. . Controlling transfer of power between connected networksControlling sharing of load between connected networks
H02J 3/08
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. . Synchronising of networks
H02J 3/10
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Constant-current supply systems
H02J 3/12
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for adjusting voltage in ac networks by changing a characteristic of the network load
H02J 3/14
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. . by switching loads on to, or off from, network, e.g. progressively balanced loading
H02J 3/16
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. . by adjustment of reactive power
H02J 3/18
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Arrangements for adjusting, eliminating, or compensating reactive power in networks (for adjustment of voltage H02J 3/12; use of Petersen coils H02H 9/08)
H02J 3/20
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. . in long overhead lines
H02J 3/22
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. . in cables
H02J 3/24
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Arrangements for preventing or reducing oscillations of power in networks (by control effected upon a single generator H02P 9/00)
H02J 3/26
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Arrangements for eliminating or reducing asymmetry in polyphase networks
H02J 3/28
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Arrangements for balancing the load in a network by storage of energy
H02J 3/30
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. . using dynamo-electric machines coupled to flywheels
H02J 3/32
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. . using batteries with converting means
H02J 3/34
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Arrangements for transfer of electric power between networks of substantially different frequency (frequency converters H02M)
H02J 3/36
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Arrangements for transfer of electric power between ac networks via a high-tension dc link
H02J 3/38
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Arrangements for parallelly feeding a single network by two or more generators, converters, or transformers
H02J 3/40
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. . Synchronising a generator for connection to a network or to another generator
H02J 3/42
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. . . with automatic parallel connection when synchronism is achieved
H02J 3/44
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. . . with means for ensuring correct phase sequence
H02J 3/46
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. . Controlling the sharing of output between the generators, converters, or transformers
H02J 3/48
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. . . Controlling the sharing of the in-phase component
H02J 3/50
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. . . Controlling the sharing of the out-of-phase component
H02J 4/00
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Circuit arrangements for mains or distribution networks not specified as ac or dc [2]
H02J 5/00
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Circuit arrangements for transfer of electric power between ac networks and dc networks (H02J 3/36 takes precedence)
H02J 7/00
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Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 9/00
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Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting (with provision for charging standby battery H02J 7/00)
H02J 11/00
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Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed, or converted (emergency or standby arrangements H02J 9/00)
H02J 13/00
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Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
H02J 15/00
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Systems for storing electric energy (mechanical systems therefor F01-F04; in chemical form H01M) [2]
H02J 17/00
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Systems for supplying or distributing electric power by electromagnetic waves [3]
H02K
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DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H 53/00; conversion of dc or ac input power into surge output power H02M 9/00)
H02M
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APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMSCONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWERCONTROL OR REGULATION THEREOF (conversion of current or voltage specially adapted for use in electronic time-pieces with no moving parts G04G 19/02; systems for regulating electric or magnetic variables in general, e.g. using transformers, reactors or choke coils, combination of such systems with static converters G05F; for digital computers G06F 1/00; transformers H01F; connection or control of one converter with regard to conjoint operation with a similar or other source of supply H02J; dynamo-electric converters H02K 47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P; pulse generators H03K) [4, 5]
H02N
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ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
H02P
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CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERSCONTROLLING TRANSFORMERS OR REACTORS OR CHOKE COILS [4]
H03
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BASIC ELECTRONIC CIRCUITRY
H04
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ELECTRIC COMMUNICATION TECHNIQUE
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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