IPC Main Group
G04C 23/00 Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PHYSICS
- Class:
- HOROLOGY
- Subclass:
- ELECTROMECHANICAL CLOCKS OR WATCHES
Scope Notes
Limiting references: Producing acoustic time signals by electrical means
3 direct subcodes
Child Classifications
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- G04C 23/02 Constructional details
- G04C 23/14 Mechanisms continuously running to relate the operation(s) to the time of day
- G04C 23/38 Mechanisms measuring a chosen time interval independently of the time of day at which the interval starts