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Koji Yamaguchi
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Hitachinaka, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Semiconductor element drive device with level shift circuit and app...
Patent number
7,957,167
Issue date
Jun 7, 2011
Hitachi, Ltd.
Koji Yamaguchi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Power converter
Patent number
7,777,433
Issue date
Aug 17, 2010
Hitachi, Ltd.
Koji Yamaguchi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Patents Applications
last 30 patents
Information
Patent Application
Semiconductor element drive device, power conversion device, motor...
Publication number
20070285046
Publication date
Dec 13, 2007
Hitachi, Ltd
Koji Yamaguchi
H03 - BASIC ELECTRONIC CIRCUITRY
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Patent Application
Power converter
Publication number
20060086981
Publication date
Apr 27, 2006
HITACHI, LTD.
Koji Yamaguchi
H01 - BASIC ELECTRIC ELEMENTS