Shigefumi Hosokawa

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Iruma, JP

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Patents Grantslast 30 patents

Information Patent Grant
Pin-board matrix switch
- Patent number 5,544,004
- Issue date Aug 6, 1996
- Nippon Telegraph & Telephone Corporation
- Shuichiro Inagaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Automated optical main distributing frame system
- Patent number 5,204,921
- Issue date Apr 20, 1993
- Nippon Telegraph & Telephone Corporation
- Tsuneo Kanai
- G02 - OPTICS
Information Patent Grant
Matrix switching device and method of manufacturing the same
- Patent number 5,017,145
- Issue date May 21, 1991
- Nippon Telegraph & Telephone Corporation
- Tsuneo Kanai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE