Ryoji Sakamoto

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Field-effect transistor
- Patent number 6,555,850
- Issue date Apr 29, 2003
- Sumitomo Electric Industries, Ltd.
- Ryoji Sakamoto
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Field-effect transistor
- Patent number 6,333,523
- Issue date Dec 25, 2001
- Sumitomo Electric Industries, Ltd.
- Ryoji Sakamoto
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical module circuit board having flexible structure
- Patent number 5,742,480
- Issue date Apr 21, 1998
- Sumitomo Electric Industries, Ltd.
- Sosaku Sawada
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Optical module having structure for defining fixing position of sleeve
- Patent number 5,596,665
- Issue date Jan 21, 1997
- Sumitomo Electric Industries, Ltd.
- Hiromi Kurashima
- G02 - OPTICS