IPC Subgroup
G04D 7/1 for hairsprings
Introduced: September 1968
Last revised: January 2006
Full Title
Measuring, counting, calibrating, testing, or regulating apparatus > for hairsprings
Classification Context
- Section:
- PHYSICS
- Class:
- HOROLOGY
- Subclass:
- APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES