Yoshihito Asai

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of controlling transient recovery voltage and gas insulation...
- Patent number 5,821,496
- Issue date Oct 13, 1998
- Hitachi, Ltd.
- Eisaku Mizufune
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Puffer type gas circuit breaker
- Patent number 5,814,781
- Issue date Sep 29, 1998
- Hitachi, Ltd.
- Osamu Koyanagi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Puffer type gas breaker
- Patent number 5,793,597
- Issue date Aug 11, 1998
- Hitachi, Ltd.
- Eisaku Mizufune
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Compression gas puffer type circuit breaker
- Patent number 5,610,381
- Issue date Mar 11, 1997
- Hitachi, Ltd.
- Eisaku Mizufune
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electrical power supply system
- Patent number 5,473,494
- Issue date Dec 5, 1995
- Hitachi, Ltd.
- Yukio Kurosawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Tank type gas circuit breaker
- Patent number 4,788,392
- Issue date Nov 29, 1988
- Hitachi, Ltd.
- Yoshihito Asai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Puffer type gas circuit breaker
- Patent number 4,236,053
- Issue date Nov 25, 1980
- Hitachi, Ltd.
- Koji Sasaki
- H01 - BASIC ELECTRIC ELEMENTS