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IPC entry: G04B 9/00 Main group [Version 2024.01 (current), Language EN - English]

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Symbol		Title
A		HUMAN NECESSITIES
B		PERFORMING OPERATIONS; TRANSPORTING
C		CHEMISTRY; METALLURGY
D		TEXTILES; PAPER
E		FIXED CONSTRUCTIONS
F		MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
G		PHYSICS
G01		MEASURING; TESTING
G02		OPTICS
G03		PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY [4]
G04		HOROLOGY
G04B		MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-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)
G04B 1/00		Driving mechanisms
G04B 1/00		Driving mechanisms [1, 2006.01]
G04B 3/00		Winding
G04B 3/00		Normal winding of clockworks by hand or mechanically; Winding-up several mainsprings or driving weights simultaneously [1, 2006.01]
G04B 5/00		Automatic winding-up [1, 2006.01]
G04B 7/00		Combined normal and automatic winding-up [1, 2006.01]
G04B 9/00		Supervision of the state of winding, e.g. indicating the amount of winding [1, 2006.01]
G04B 9/02		. Devices controlled by such state, e.g. device affording protection against overwinding (protecting means preventing overwinding arranged in or on the barrel G04B 1/20; protecting means in connection with keys or the like G04B 3/06; in connection with parts of the cases G04B 3/10; in connection with automatic winding devices G04B 5/24) [1, 2006.01]
G04B 11/00		Click devices, stop clicks or clutches for winding [1, 2006.01]
G04B 13/00
G04B 13/00		Gearwork [1, 2006.01]
G04B 15/00		Escapements (electric or magnetic means for converting oscillatory to rotary motion in electromechanical time-pieces G04C 5/00) [1, 2006.01]
G04B 17/00		Mechanisms for stabilising frequency [1, 3, 2006.01]
G04B 18/00		Mechanisms for setting frequency [3, 2006.01]
G04B 19/00		Time indicating
G04B 19/00		Indicating the time by visual means (by electric lamps G04C 17/02; display arrangements in general G09) [1, 2006.01]
G04B 21/00		Indicating the time by acoustic means (at preselected times G04B 23/00; by electro-acoustic means G04C 21/04; sound-producing apparatus per seG10) [1, 2006.01]
G04B 23/00		Arrangements producing acoustic signals at preselected times (electrically-released alarm signals G04C 21/00; metronomes G04F 5/02; sound-producing apparatus per seG10) [1, 2006.01]
G04B 25/00		Indicating the time by other means or by combined means (electric or electromechanical indicating G04C) [1, 2006.01]
G04B 27/00		Mechanical devices for setting the time-indicating means [1, 2006.01]
G04B 29/00		Frameworks, supports, or arrangements of the clockwork parts in relation to each other, so-called "calibers"
G04B 29/00		Frameworks [1, 2006.01]
G04B 31/00		Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor (bearings in general F16C) [1, 2006.01]
G04B 33/00		Calibers [1, 2006.01]
G04B 35/00		Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears [1, 2006.01]
G04B 37/00		Protection of the clockwork against damage from outside
G04B 37/00		Cases [1, 2006.01]
G04B 39/00		Watch crystals; Fastening or sealing crystals; Clock glasses [1, 2006.01]
G04B 41/00		Locking or holding devices for pendulums, chimes, or the like, for use during transport [1, 2006.01]
G04B 43/00		Protecting clockworks by shields or other means against external influences, e.g. magnetic fields [1, 2006.01]
G04B 45/00		Clocks with unusual features
G04B 45/00		Time-pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effect (ornamental shaping of dials G04B 19/10) [1, 2006.01]
G04B 47/00		Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece (G04B 37/12 takes precedence; writing or drawing implements with devices for indicating time B43K 29/087; combinations with vehicle mirror assemblies B60R 1/12; combined with cameras, projectors, or photographic printing apparatus G03B 29/00) [1, 2006.01]
G04B 49/00
G04B 49/00		Time-pieces using the position of the sun, moon, or stars [1, 2006.01]
G04B 99/00		Subject matter not provided for in other groups of this subclass [2006.01]
G04C		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		APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
G04F		TIME-INTERVAL MEASURING (measuring pulse characteristics G01R, e.g. G01R 29/02; in radar or like systems G01S) [2]
G04G		ELECTRONIC TIME-PIECES [3]
G04R		RADIO-CONTROLLED TIME-PIECES [2013.01]
G05		CONTROLLING; REGULATING
G06		COMPUTING; CALCULATING OR COUNTING
G07		CHECKING-DEVICES
G08		SIGNALLING
G09		EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G10		MUSICAL INSTRUMENTS; ACOUSTICS
G11		INFORMATION STORAGE
G12		INSTRUMENT DETAILS
G16		INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS [2018.01]
G21		NUCLEAR PHYSICS; NUCLEAR ENGINEERING
G99		SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
H		ELECTRICITY

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