DIFF Subgroup
G04B 3/04 Rigidly-mounted keys, knobs or crowns
Introduced: September 1968
Title
Titles differ between systems:
IPC: Rigidly-mounted keys, knobs, or crowns
CPC: Rigidly-mounted keys, knobs or crowns
Full Title
Full titles differ between systems:
IPC:
Normal winding of clockworks by hand or mechanically; Winding-up several mainsprings or driving weights simultaneously > Rigidly-mounted keys, knobs, or crowns
CPC:
Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously > Rigidly-mounted keys, knobs or crowns
Of 5 combined children, 0 exist in both systems.
5 codes are CPC-only extensions.
Child Classifications
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Top Applicants
Top Applicants (IPC)
Class G04,2013–2023, worldwide · Source: EPO PATSTAT
- THE SWATCH GROUP RESEARCH AND DEVELOPMENT CH 1,570
- ETA SA MANUFACTURE HORLOGERE SUISSE CH 1,409
- CASIO COMPUTER COMPANY 1,172
- SEIKO EPSON CORPORATION 1,100
- SAMSUNG ELECTRONICS COMPANY KR 768
- NIVAROX-FAR CH 750
- MONTRES BREGUET CH 707
- APPLE US 706
- SEIKO EPSON CORPORATION JP 648
- CITIZEN WATCH COMPANY 578
Top Applicants (CPC)
Class G04,2013–2023, worldwide · Source: EPO PATSTAT
- THE SWATCH GROUP RESEARCH AND DEVELOPMENT CH 1,705
- ETA SA MANUFACTURE HORLOGERE SUISSE CH 1,443
- SAMSUNG ELECTRONICS COMPANY KR 1,104
- APPLE US 1,038
- SEIKO EPSON CORPORATION 875
- NIVAROX-FAR CH 781
- CASIO COMPUTER COMPANY 734
- MONTRES BREGUET CH 715
- SEIKO EPSON CORPORATION JP 715
- OMEGA CH 555