Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously

Introduced: September 1968

Title

Titles differ between systems:

IPC: Normal winding of clockworks by hand or mechanically; Winding-up several mainsprings or driving weights simultaneously

CPC: Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously

Full titles differ between systems:

IPC:

Normal winding of clockworks by hand or mechanically; Winding-up several mainsprings or driving weights simultaneously

CPC:

Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously

Of 10 combined children, 5 exist in both systems.

5 codes are CPC-only extensions.

3 shared codes have differing titles between IPC and CPC.

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G04B 3/001 CPC only CPC only
G04B 3/003 CPC only CPC only
G04B 3/005 CPC only CPC only
G04B 3/006 CPC only CPC only
G04B 3/008 CPC only CPC only
G04B 3/02 Removably-mounted keys or the like IPC+CPC Available in IPC and CPC
G04B 3/04 Rigidly-mounted keys, knobs or crowns +5 CPC IPC+CPC Available in IPC and CPC
G04B 3/06 Keys or the like with means preventing overwinding (protecting devices arranged in, or attached to, the barrel G04B1/20; in connection with automatic winding devices G04B1/24 ) IPC+CPC Available in IPC and CPC
G04B 3/08 by parts of the cases IPC+CPC Available in IPC and CPC
G04B 3/12 by mechanical means, e.g. pneumatic motor (winding up with electric or electromechanical means G04C ) IPC+CPC Available in IPC and CPC

Class G04,2013–2023, worldwide · Source: EPO PATSTAT

Class G04,2013–2023, worldwide · Source: EPO PATSTAT