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Yoshiteru Shimizu
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Hitachi, JP
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last 30 patents
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Patent Grant
Overvoltage self-protection semiconductor device, method of fabrica...
Patent number
5,627,387
Issue date
May 6, 1997
Hitachi, Ltd.
Susumu Murakami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Semiconductor device having a semi-insulating layer
Patent number
5,552,625
Issue date
Sep 3, 1996
Hitachi, Ltd.
Susumu Murakami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Gate turn-off thyristor
Patent number
4,786,959
Issue date
Nov 22, 1988
Hitachi, Ltd.
Yoshiteru Shimizu
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Light triggered semiconductor device with detachable auxiliary thyr...
Patent number
4,757,367
Issue date
Jul 12, 1988
Hitachi, Ltd.
Nobutake Konishi
G02 - OPTICS
Information
Patent Grant
Semiconductor controlled rectifier device with small area dV/dt sel...
Patent number
4,240,091
Issue date
Dec 16, 1980
Hitachi, Ltd.
Tsutomu Yatsuo
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Solder layer for a semi-conductor device consisting of at least one...
Patent number
4,110,783
Issue date
Aug 29, 1978
Hitachi, Ltd.
Hisakichi Onodera
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