Tadasu Ishikawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electric field sensor
- Patent number 5,574,805
- Issue date Nov 12, 1996
- Tokin Corporation
- Yoshikazu Toba
- G01 - MEASURING TESTING
Information Patent Grant
Optical transmission and reception module having coupled optical wa...
- Patent number 5,497,438
- Issue date Mar 5, 1996
- Nippon Hoso Kyokai
- Tadasu Ishikawa
- G02 - OPTICS
Information Patent Grant
Bidirectional light transmission system and optical device therefor
- Patent number 5,361,157
- Issue date Nov 1, 1994
- Nippon Hoso Kyokai
- Tadasu Ishikawa
- G02 - OPTICS