Shizuo Yamaguchi

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Sayama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Portable information device
- Patent number 6,306,538
- Issue date Oct 23, 2001
- Citizen Watch Co., Ltd.
- Asao Saitoh
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Power supply switching circuit for portable equipment
- Patent number 6,060,789
- Issue date May 9, 2000
- Citizen Watch Co., Ltd.
- Shizuo Yamaguchi
- G06 - COMPUTING CALCULATING COUNTING