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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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MEASURING (counting G06M)TESTING
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]
G04F 1/00
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Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timer (time or time-programme switches which automatically terminate their operation after the programme is completed H01H 43/00)
G04F 3/00
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Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeter with clockwork (time or time-programme switches which automatically terminate their operation after the programme is completed H01H 43/00)
G04F 5/00
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Apparatus for producing preselected time intervals for use as timing standards (generating clock signals for electric digital computers G06F 1/04; automatic frequency control or stabilisation of generators in general H03L)
G04F 5/02
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Metronomes
G04F 5/04
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using oscillators with electromechanical resonators [2]
G04F 5/06
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. . using piezo-electric resonators [2]
G04F 5/08
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. . using magnetostrictive resonators [2]
G04F 5/10
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using electric or electronic resonators (G04F 5/14 takes precedence) [2]
G04F 5/12
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using fluidic devices [2]
G04F 5/14
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using atomic clocks [2]
G04F 5/16
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using pulses produced by radio-isotopes [2]
G04F 7/00
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Apparatus for measuring unknown time intervals by non-electric means (G04F 13/06 takes precedence) [2]
G04F 8/00
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Apparatus for measuring unknown time intervals by electromechanical means [2]
G04F 10/00
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Apparatus for measuring unknown time intervals by electric means [2]
G04F 13/00
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Apparatus for measuring unknown time intervals by means not provided for in groups G04F 5/00-G04F 10/00 [2]
G04G
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ELECTRONIC TIME-PIECES [3]
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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