Hisashi Kawahara

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Patents Grantslast 30 patents

Information Patent Grant
Rechargeable electronic watch and driving method of rechargeable el...
- Patent number 6,816,439
- Issue date Nov 9, 2004
- Citizen Watch Co., Ltd.
- Hisashi Kawahara
- G04 - HOROLOGY
Information Patent Grant
Heavy-load drive apparatus for an electronic watch
- Patent number 5,886,953
- Issue date Mar 23, 1999
- Citizen Watch Co., Ltd.
- Hisashi Kawahara
- G04 - HOROLOGY
Information Patent Grant
Electronic timepiece with a depth gauge
- Patent number 4,611,923
- Issue date Sep 16, 1986
- Citizen Watch Co., Ltd.
- Hisashi Kawahara
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
Information Patent Grant
Multi-function analogue type watch
- Patent number 4,505,594
- Issue date Mar 19, 1985
- Citizen Watch Co. Ltd.
- Hisashi Kawahara
- G04 - HOROLOGY
Information Patent Grant
Electronic timepiece
- Patent number 4,397,564
- Issue date Aug 9, 1983
- Citizen Watch Co. Ltd.
- Hisashi Kawahara
- G01 - MEASURING TESTING
Information Patent Grant
Correction signal generating system for an electronic timepiece
- Patent number 4,367,958
- Issue date Jan 11, 1983
- Citizen Watch Company Limited
- Hisashi Kawahara
- G04 - HOROLOGY
Information Patent Grant
Voltage control system for electronic timepiece
- Patent number 4,328,572
- Issue date May 4, 1982
- Citizen Watch Company Limited
- Hisashi Kawahara
- G04 - HOROLOGY