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A
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HUMAN NECESSITIES
B
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PERFORMING OPERATIONSTRANSPORTING
C
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CHEMISTRYMETALLURGY
D
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TEXTILESPAPER
E
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FIXED CONSTRUCTIONS
F
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MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
G
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PHYSICS
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
G04B
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MECHANICALLY-DRIVEN CLOCKS OR WATCHESMECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERALTIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built-in means operating any device at preselected times or after predetermined time intervals G04C 23/00; clocks or watches with stop devices G04F 7/08; structural details or housings specially adapted for electronic time-pieces with no moving parts G04G 17/00)
G04C
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ELECTROMECHANICAL CLOCKS OR WATCHES (mechanical parts of clocks or watches in general G04B; electronic time-pieces with no moving parts, electronic circuitry for producing timing pulses G04G)
G04C 1/00
Electric winding of mechanical clocksIndependent electric clocks or watches
G04C 1/00
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Winding mechanical clocks electrically (winding mechanically G04B 3/00) [1, 2006.01]
G04C 3/00
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Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means (clocks driven by synchronous motors G04C 15/00) [1, 2006.01]
G04C 5/00
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Electric or magnetic means for converting oscillatory to rotary motion in time-pieces, i.e. electric or magnetic escapements (regulators G04C 3/00) [1, 3, 2006.01]
G04C 9/00
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Electrically-actuated devices for setting the time-indicating means (of slave clocks G04C 13/03; radio-controlled time-pieces G04R) [1, 3, 2006.01]
G04C 10/00
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Arrangements of electric power supplies in time-pieces [3, 2006.01]
G04C 11/00
Electric clock installationsMaster-and-slave clock systemsSynchronous-motor clocks
G04C 11/00
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Synchronisation of independently-driven clocks (radio-controlled time-pieces G04R) [1, 2006.01]
G04C 13/00
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Driving mechanisms for clocks by master clocks [1, 2006.01]
G04C 15/00
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Clocks driven by synchronous motors [1, 2006.01]
G04C 17/00
Indicating the time or producing time signals electrically
G04C 17/00
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Indicating the time optically by electric means (G04C 19/00 takes precedence; liquid crystal materials C09K 19/00; by mechanical means G04B 19/00, G04B 19/20) [1, 3, 2006.01]
G04C 19/00
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Producing optical time signals at prefixed times by electric means [1, 2006.01]
G04C 21/00
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Producing acoustic time signals by electrical means [1, 2006.01]
G04C 23/00

G04C 23/00
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Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals (if restricted to producing acoustic time signals by electrical means G04C 21/00; mechanical alarm clocks G04B 23/02; apparatus which can be set and started to measure-off predetermined intervals G04F 3/06; time or time-programme switches which automatically terminate their operation after the programme is completed H01H 43/00) [1, 2006.01]
G04C 23/02
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Constructional details [1, 2006.01]
G04C 23/04
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. . Housings, supports, shielding, or similar stationary parts [1, 2006.01]
G04C 23/06
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. . Driving or regulating means [1, 2006.01]
G04C 23/08
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. . Programming means [1, 2006.01]
G04C 23/10
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. . for actuating any element which operates, or initiates the operation of, the device concerned [1, 2006.01]
G04C 23/12
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. . Electric circuitry [1, 2006.01]
G04C 23/14
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Mechanisms continuously running to relate the operation(s) to the time of day [1, 2006.01]
G04C 23/16
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. . acting only at one preselected time or during one adjustable time interval [1, 2006.01]
G04C 23/18
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. . for operating one device at a number of different times [1, 2006.01]
G04C 23/20
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. . . with contacts operated, or formed, by clock hands or elements of similar form [1, 2006.01]
G04C 23/22
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. . . with the actuating element carried by a disc [1, 2006.01]
G04C 23/24
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. . . . the actuating element controlling another element mechanically [1, 2006.01]
G04C 23/26
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. . for operating a number of devices at different times [1, 2006.01]
G04C 23/28
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. . . with contacts operated, or formed, by clock hands or elements of similar form [1, 2006.01]
G04C 23/30
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. . . with the actuating element carried by a disc [1, 2006.01]
G04C 23/32
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. . . . the actuating element controlling another element mechanically [1, 2006.01]
G04C 23/34
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. . with provision for automatic modification of the programme, e.g. on Sunday [1, 2006.01]
G04C 23/36
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. . . by external influences [1, 2006.01]
G04C 23/38
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Mechanisms measuring a chosen time interval independently of the time of day at which the interval starts [1, 2006.01]
G04C 23/40
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. . using continuously-running mechanism [1, 2006.01]
G04C 23/42
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. . acting only at the end of a single time interval [1, 2006.01]
G04C 23/44
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. . . with provision for selection from a number of preset intervals [1, 2006.01]
G04C 23/46
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. . . with provision for adjustment of the interval (G04C 23/44 takes precedence) [1, 2006.01]
G04C 23/48
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. . acting at the ends of successive time intervals [1, 2006.01]
G04C 23/50
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. . with provision for modification of the interval(s) by external influences [1, 2006.01]
G04C 99/00
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Subject matter not provided for in other groups of this subclass [2006.01]
G04D
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APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
G04F
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TIME-INTERVAL MEASURING (measuring pulse characteristics G01R, e.g. G01R 29/02; in radar or like systems G01S) [2]
G04G
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ELECTRONIC TIME-PIECES [3]
G04R
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RADIO-CONTROLLED TIME-PIECES [2013.01]
G05
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CONTROLLINGREGULATING
G06
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COMPUTINGCALCULATING OR COUNTING
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
G11
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INFORMATION STORAGE
G12
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INSTRUMENT DETAILS
G16
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INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS [2018.01]
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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ELECTRICITY

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