Supervision of the state of winding, e.g. indicating the amount of winding

Introduced: September 1968

Of 2 combined children, 1 exist in both systems.

1 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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G04B 9/005 CPC only CPC only
G04B 9/02 Devices controlled by such state, e.g. device affording protection means against overwinding (protecting means preventing overwinding arranged in or on the barrel G04B1/20; protecting means in connection with keys or the like G04B3/06; in connection with parts of the cases G04B3/10; in connection with automatic winding devices G04B5/24 ) +1 CPC IPC+CPC Available in IPC and CPC