Tsutomu Yoshiya

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for manufacturing optic transmission modules and system for...
- Patent number 6,661,503
- Issue date Dec 9, 2003
- Hitachi, Ltd.
- Kazuo Yamaguchi
- G01 - MEASURING TESTING
Information Patent Grant
Two-way optical transmission system
- Patent number 4,880,289
- Issue date Nov 14, 1989
- Hitachi, Ltd.
- Katsuyuki Imoto
- G02 - OPTICS