IPC Subgroup
G04C 1/06 winding-up springs
Introduced: September 1968
Last revised: January 2006
Full Title
Winding mechanical clocks electrically > by electric motors with rotating or with reciprocating movement > winding-up springs
Classification Context
- Section:
- PHYSICS
- Class:
- HOROLOGY
- Subclass:
- ELECTROMECHANICAL CLOCKS OR WATCHES