IPC Subgroup
G04B 37/02 Evacuated cases; Cases filled with gases or liquids; Cases containing substances for absorbing or binding moisture or dust
Introduced: September 1968
Last revised: January 2006
Full Title
Cases > Evacuated cases; Cases filled with gases or liquids; Cases containing substances for absorbing or binding moisture or dust
Classification Context
- Section:
- PHYSICS
- Class:
- HOROLOGY
- Subclass:
- MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS