IPC Main Group
G04B 17/00 Mechanisms for stabilising frequency
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PHYSICS
- Class:
- HOROLOGY
- Subclass:
- MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS
Related Keywords
REGULATING of mechanical clocks
5 direct subcodes
Child Classifications
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- G04B 17/02 Oscillators acting by gravity, e.g. pendulum swinging in a plane
- G04B 17/04 Oscillators acting by spring tension
- G04B 17/2 Compensation of mechanisms for stabilizing frequency
- G04B 17/3 Rotating governors, e.g. centrifugal governors, fan governors
- G04B 17/32 Component parts or constructional details, e.g. collet, stud
Top Applicants
Top 10 applicants by patent filingsfor 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