Kouichi Otsuka

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Chiba, JA

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Patents Grantslast 30 patents

Information Patent Grant
Counting or indicating ring device
- Patent number 4,009,370
- Issue date Feb 22, 1977
- Kabushiki Kaisha Daini Seikosha
- Kouichi Otsuka
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES