Yoshihiro Onuma

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Hitatsuka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of manufacturing two-layer printed circuit sheet
- Patent number 4,908,940
- Issue date Mar 20, 1990
- The Furukawa Electric Co., Ltd.
- Toshiaki Amano
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Optical switch and optical keyboard utilizing the same
- Patent number 4,836,636
- Issue date Jun 6, 1989
- The Furukawa Electric Co., Ltd.
- Yuichi Obara
- G02 - OPTICS