IPC Subgroup
G04C 21/36 Signal-repeating devices
Introduced: September 1968
Last revised: January 2006
Full Title
Producing acoustic time signals by electrical means > producing the signals at adjustable fixed times > Signal-repeating devices
Classification Context
- Section:
- PHYSICS
- Class:
- HOROLOGY
- Subclass:
- ELECTROMECHANICAL CLOCKS OR WATCHES