using a piezoelectric oscillator not used

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G04F8/04

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GPHYSICS G04Horology G04FTIME-INTERVAL MEASURING G04F8/00Apparatus for measuring unknown time intervals by electromechanical means

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G04F8/04using a piezoelectric oscillator not used

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Patents Grantslast 30 patents

Information Patent Grant
Movement for mechanical chronograph with quartz regulator
- Patent number 9,348,316
- Issue date May 24, 2016
- Richemont International SA
- Willy Meier
- G04 - HOROLOGY
Information Patent Grant
Stop watch
- Patent number 4,211,066
- Issue date Jul 8, 1980
- Kabushiki Kaisha Daini Seikosha
- Yasuo Kusumoto
- G04 - HOROLOGY

Patents Applicationslast 30 patents