IPC Subgroup
G01R 9/04 using vibrating reeds, e.g. for measuring frequency
Introduced: September 1968
Last revised: January 2006
Full Title
Instruments employing mechanical resonance > using vibrating reeds, e.g. for measuring frequency
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
2 direct subcodes
Child Classifications
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