DIFF Subgroup
G04F 7/08 Watches or clocks with stop devices, e.g. chronograph
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Apparatus for measuring unknown time intervals by non-electric means > using a mechanical oscillator > Watches or clocks with stop devices, e.g. chronograph
CPC:
Apparatus for measuring unknown time intervals by non-electric means (using fluidic means G04F13/06) > using a mechanical oscillator > Watches or clocks with stop devices, e.g. chronograph
Of 4 combined children, 0 exist in both systems.
4 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