DIFF Subgroup
G04B 17/34 for fastening the hairspring onto the balance
Introduced: January 1980
Full Title
Mechanisms for stabilising frequency > Component parts or constructional details, e.g. collet, stud > for fastening the hairspring onto the balance
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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