Shigeo Ohtaka

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Takasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Semiconductor device having a protection circuit, and electronic sy...
- Patent number 5,638,246
- Issue date Jun 10, 1997
- Hitachi, Ltd.
- Kozo Sakamoto
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method of manufacturing semiconductor device with controlled carrie...
- Patent number 5,196,354
- Issue date Mar 23, 1993
- Hitachi, Ltd.
- Shigeo Ohtaka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of fabricating semiconductor devices which include vertical...
- Patent number 4,814,288
- Issue date Mar 21, 1989
- Hitachi, Ltd.
- Masatoshi Kimura
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
DMOS With gate protection diode formed over base region
- Patent number 4,492,974
- Issue date Jan 8, 1985
- Hitachi, Ltd.
- Isao Yoshida
- H01 - BASIC ELECTRIC ELEMENTS