Yasuharu Seki

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Hitachi, JP

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Patents Grantslast 30 patents

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Puffer-type gas circuit breaker
- Patent number 5,229,561
- Issue date Jul 20, 1993
- Hitachi, Ltd.
- Yasuharu Seki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gas circuit breaker
- Patent number 5,159,164
- Issue date Oct 27, 1992
- Hitachi, Ltd.
- Osamu Koyanagi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gas circuit breaker
- Patent number 5,153,397
- Issue date Oct 6, 1992
- Hitachi, Ltd.
- Yasuharu Seki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gas circuit breaker
- Patent number 5,151,566
- Issue date Sep 29, 1992
- Hitachi, Ltd.
- Osamu Koyanagi
- H01 - BASIC ELECTRIC ELEMENTS
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Puffer type gas circuit breaker, contact cover and insulated nozzle...
- Patent number 5,079,391
- Issue date Jan 7, 1992
- Hitachi, Ltd.
- Osamu Koyanagi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gas circuit breaker
- Patent number 5,072,084
- Issue date Dec 10, 1991
- Hitachi, Ltd.
- Yasuharu Seki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Switch
- Patent number 5,045,651
- Issue date Sep 3, 1991
- Hitachi, Ltd.
- Takahide Seki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Three-phase common container-type circuit breaker
- Patent number 5,012,051
- Issue date Apr 30, 1991
- Hitachi, Ltd.
- Masanori Tsukushi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER