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DIFF Main Group
G04F 13/00

Apparatus for measuring unknown time intervals by means not provided for in groups G04F5/00 - G04F10/00

Introduced: July 1974

Title

Titles differ between systems:

IPC: Apparatus for measuring unknown time intervals by means not provided for in groups

CPC: Apparatus for measuring unknown time intervals by means not provided for in groups G04F5/00 - G04F10/00

Full Title

Full titles differ between systems:

IPC:

Apparatus for measuring unknown time intervals by means not provided for in groups

CPC:

Apparatus for measuring unknown time intervals by means not provided for in groups G04F5/00 - G04F10/00

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

IPC defines codes here since 1974.

Child Classifications

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  • G04F 13/04 using electrochemical means since 1974 IPC+CPC Available in IPC and CPC
  • G04F 13/06 using fluidic means since 1974 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

  1. THE SWATCH GROUP RESEARCH AND DEVELOPMENT CH 1,570
  2. ETA SA MANUFACTURE HORLOGERE SUISSE CH 1,409
  3. CASIO COMPUTER COMPANY 1,172
  4. SEIKO EPSON CORPORATION 1,100
  5. SAMSUNG ELECTRONICS COMPANY KR 768
  6. NIVAROX-FAR CH 750
  7. MONTRES BREGUET CH 707
  8. APPLE US 706
  9. SEIKO EPSON CORPORATION JP 648
  10. CITIZEN WATCH COMPANY 578

Top Applicants (CPC)

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

  1. THE SWATCH GROUP RESEARCH AND DEVELOPMENT CH 1,705
  2. ETA SA MANUFACTURE HORLOGERE SUISSE CH 1,443
  3. SAMSUNG ELECTRONICS COMPANY KR 1,104
  4. APPLE US 1,038
  5. SEIKO EPSON CORPORATION 875
  6. NIVAROX-FAR CH 781
  7. CASIO COMPUTER COMPANY 734
  8. MONTRES BREGUET CH 715
  9. SEIKO EPSON CORPORATION JP 715
  10. OMEGA CH 555