Shuji Ohtawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Self-chargeable electronic timepiece with operating voltage checking
- Patent number 4,785,435
- Issue date Nov 15, 1988
- Seiko Instruments Inc.
- Yuichi Inoue
- G04 - HOROLOGY
Information Patent Grant
Circuit for charging capacitors
- Patent number 4,750,099
- Issue date Jun 7, 1988
- Seiko Instruments Inc.
- Yuichi Inoue
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electronic timepiece
- Patent number 4,737,944
- Issue date Apr 12, 1988
- Seiko Instruments Inc.
- Yuichi Inoue
- G04 - HOROLOGY