G04F TIME-INTERVAL MEASURING (measuring pulse characteristics G01R, e.g. G01R29/02; in radar or like systems G01S)
Introduced: September 1968
Description
G04F covers devices and methods for measuring time intervals and durations between events, including stopwatches, timers, and interval measurement instruments. This subclass encompasses mechanical, electronic, and digital mechanisms that measure, display, and control specific time periods for practical applications such as sports timing, industrial processes, and scientific experiments. Excluded are general timekeeping and clock mechanisms (G04B), clocks with specific functions (G04C-G04E), and time-of-day displays without interval measurement capability.
Title
Titles differ between systems:
IPC: TIME-INTERVAL MEASURING
CPC: TIME-INTERVAL MEASURING (measuring pulse characteristics G01R, e.g. G01R29/02; in radar or like systems G01S)
Full Title
Full titles differ between systems:
TIME-INTERVAL MEASURING
TIME-INTERVAL MEASURING (measuring pulse characteristics G01R, e.g. G01R29/02; in radar or like systems G01S)
Additional Content IPC
Measuring pulse characteristics , e.g. in radar or like systems
IPC and CPC are identically structured here. All 7 subcodes exist in both systems.
3 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G04F 1/00 Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers +1 CPC IPC+CPC Available in IPC and CPC
- G04F 10/00 Apparatus for measuring unknown time intervals by electric means since 1974 +1 CPC −1 IPC IPC+CPC Available in IPC and CPC
- G04F 13/00 Apparatus for measuring unknown time intervals by means not provided for in groups G04F5/00 - G04F10/00 since 1974 IPC+CPC Available in IPC and CPC
- G04F 3/00 Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork IPC+CPC Available in IPC and CPC
- G04F 5/00 Apparatus for producing preselected time intervals for use as timing standards (generating clock signals for electric digital computers G06F1/04) IPC+CPC Available in IPC and CPC
- G04F 7/00 Apparatus for measuring unknown time intervals by non-electric means (using fluidic means G04F13/06) IPC+CPC Available in IPC and CPC
- G04F 8/00 Apparatus for measuring unknown time intervals by electromechanical means since 1974 +2 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