IPC Main Group
G04C 19/00 Producing optical time signals at prefixed times by electric means
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PHYSICS
- Class:
- HOROLOGY
- Subclass:
- ELECTROMECHANICAL CLOCKS OR WATCHES
2 direct subcodes
Child Classifications
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- G04C 19/02 by electric lamps
- G04C 19/04 by indicating members moved electrically, e.g. flap, band