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Gas circuit breaker
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Patent number 6,624,370
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Issue date Sep 23, 2003
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Hitachi, Ltd.
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Takuichiro Soga
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H01 - BASIC ELECTRIC ELEMENTS
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Gas-insulated switchgear
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Patent number 6,621,030
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Issue date Sep 16, 2003
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Hitachi, Ltd.
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Tomoyuki Andou
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H01 - BASIC ELECTRIC ELEMENTS
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Gas insulated switchgear
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Patent number 6,515,247
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Issue date Feb 4, 2003
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Hitachi, Ltd.
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Keiichi Tsuzura
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Gas insulated switchgear apparatus
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Patent number 6,399,911
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Issue date Jun 4, 2002
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Hitachi, Ltd.
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Keiichi Tsuzura
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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-
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Current limiter
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Patent number 6,067,217
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Issue date May 23, 2000
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Hitachi, Ltd.
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Junzo Kida
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Current limiter
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Patent number 5,883,774
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Issue date Mar 16, 1999
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Hitachi, Ltd.
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Junzo Kida
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Electric power flow controller
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Patent number 5,825,162
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Issue date Oct 20, 1998
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Hitachi, Ltd.
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Junzo Kida
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Current limiting circuit breaker
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Patent number 5,726,843
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Issue date Mar 10, 1998
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Hitachi, Ltd.
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Hiroshi Arita
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Solid-state switch
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Patent number 5,467,049
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Issue date Nov 14, 1995
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Hitachi, Ltd.
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Junzo Kida
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H03 - BASIC ELECTRONIC CIRCUITRY