DIFF Subgroup
G04B 19/24 Clocks or watches with date indicators ; Clockwork calendars
Introduced: September 1968
Title
Titles differ between systems:
IPC: Clocks or watches with date indicators; Clockwork calendars
CPC: Clocks or watches with date indicators ; Clockwork calendars
Full Title
Full titles differ between systems:
IPC:
Indicating the time by visual means > Clocks or watches with date indicators; Clockwork calendars
CPC:
Indicating the time by visual means ( by electric lamps G04C17/02; display arrangements in general G09F) > Clocks or watches with date indicators ; Clockwork calendars
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1980.
Child Classifications
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- G04B 19/243 characterised by the shape of the date indicator since 1980 +3 CPC IPC+CPC Available in IPC and CPC
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