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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
G01
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INSTRUMENTS
G01
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MEASURINGTESTING
G02
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OPTICS (making optical elements or apparatus B24B, B29D 11/00, C03, or other appropriate subclasses or classes; materials per se, see the relevant places, e.g. C03B, C03C)
G03
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PHOTOGRAPHYCINEMATOGRAPHYANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVESELECTROGRAPHYHOLOGRAPHY (reproduction of pictures or patterns by scanning and converting into electrical signals H04N) [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)
G04D
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APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES (machine tools in general B23, B24; hand tools in general B25)
G04F
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TIME-INTERVAL MEASURING (measuring pulse characteristics G01R, e.g. G01R 29/02; in radar or like systems G01S; masers H01S 1/00; generation of oscillations H03B; generation or counting of pulses, frequency dividing H03K; analogue/digital conversion in general H03M 1/00) [2]
G04G
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ELECTRONIC TIME-PIECES [3]
G04G 1/00
(transferred to G04G 99/00)
G04G 3/00
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Producing timing pulses (driving circuits for stepping motors G04C 3/14; producing preselected time intervals for use as timing standards G04F 5/00; pulse technique in general H03K; control, synchronisation, or stabilisation of generators in general H03L) [3]
G04G 5/00
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Setting, i.e. correcting or changing, the time-indication [3]
G04G 7/00
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Synchronisation [3]
G04G 9/00
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Visual time or date indication means [3]
G04G 11/00
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Producing optical signals at preselected times [3]
G04G 13/00
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Producing acoustic time signals [3]
G04G 15/00
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Time-pieces comprising means to be operated at preselected times or after preselected time intervals (G04G 11/00, G04G 13/00 take precedence; pulse delay circuits H03K 5/13; electronic time-delay switches H03K 17/28; electronic time-programme switches which automatically terminate their operation after the programme is completed H03K 17/296; time programming for television signal recording H04N 5/761) [3]
G04G 17/00
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Structural detailsHousings [7]
G04G 19/00
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Electric power supply circuits specially adapted for use in electronic time-pieces [7]
G04G 19/02
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Conversion or regulation of current or voltage [7]
G04G 19/04
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. . Capacitive voltage division or multiplication [7]
G04G 19/06
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. . Regulation [7]
G04G 19/08
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Arrangements for preventing voltage drop due to overloading the power supply [7]
G04G 19/10
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Arrangements for supplying back-up power [7]
G04G 19/12
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Arrangements for reducing power consumption during storage [7]
G04G 21/00
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Input or output devices integrated in time-pieces [2010.01]
G04G 99/00
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Subject matter not provided for in other groups of this subclass [2010.01]
G05
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CONTROLLINGREGULATING
G06
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COMPUTINGCALCULATINGCOUNTING (score computers for games A63B 71/06, A63D 15/20, A63F 1/18; combinations of writing implements with computing devices B43K 29/08)
G07
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CHECKING-DEVICES
G08
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SIGNALLING (indicating or display devices per seG09F; transmission of pictures H04N)
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
G21
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NUCLEONICS
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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SECTION H — ELECTRICITY

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