IPC Main Group
G04C 17/00 Indicating the time optically by electric means
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PHYSICS
- Class:
- HOROLOGY
- Subclass:
- ELECTROMECHANICAL CLOCKS OR WATCHES
Scope Notes
Limiting references: Producing optical time signals at prefixed times by electric means
1 direct subcode
Child Classifications
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- G04C 17/02 by electric lamps