Tohru Tsubaki

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Gas-blast load-break switch
- Patent number 5,084,600
- Issue date Jan 28, 1992
- Hitachi, Ltd.
- Takahide Seki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gas insulated switchgear system having single phase reserve bus
- Patent number 4,933,802
- Issue date Jun 12, 1990
- Hitachi, Ltd.
- Mitsuga Haginoya
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Gas-insulated switchgear equipment
- Patent number 4,890,193
- Issue date Dec 26, 1989
- Hitachi, Ltd.
- Tohru Tsubaki
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Gas-insulated switchgear apparatus
- Patent number 4,658,329
- Issue date Apr 14, 1987
- Hitachi, Ltd.
- Yukio Kamura
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Gas insulated switchgear equipment
- Patent number 4,503,481
- Issue date Mar 5, 1985
- Hitachi, Ltd.
- Sigeru Fujiya
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER