IPC Subgroup
G04C 13/04 Primary clocks
Introduced: September 1968
Last revised: January 2006
Full Title
Driving mechanisms for clocks by primary clocks > Circuit arrangements; Electric clock installations > Primary clocks
Classification Context
- Section:
- PHYSICS
- Class:
- HOROLOGY
- Subclass:
- ELECTROMECHANICAL CLOCKS OR WATCHES
1 direct subcode
Child Classifications
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- G04C 13/06 Contact devices