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PCE
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DIFF Subgroup
G04B 17/20

Compensation of mechanisms for stabilising frequency

Introduced: September 1968

Title

Titles differ between systems:

IPC: Compensation of mechanisms for stabilizing frequency

CPC: Compensation of mechanisms for stabilising frequency

Full Title

Full titles differ between systems:

IPC:

Mechanisms for stabilising frequency > Compensation of mechanisms for stabilizing frequency

CPC:

Mechanisms for stabilising frequency > Compensation of mechanisms for stabilising frequency

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

Child Classifications

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  • G04B 17/24 for the effect of variations of atmospheric pressure IPC+CPC Available in IPC and CPC
  • G04B 17/26 for the effect of variations of the impulses 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