Kohji Nakazato

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Light communication system
- Patent number 5,214,728
- Issue date May 25, 1993
- Sumitomo Electric Industries, Ltd.
- Masayuki Shigematsu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method for optical switching and an optical switch
- Patent number 5,136,670
- Issue date Aug 4, 1992
- Sumitomo Electric Industries, Ltd.
- Masayuki Shigematsu
- G02 - OPTICS