Yoshiaki Matsui

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Katsuta, JP

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Patents Grantslast 30 patents

Information Patent Grant
Ground fault current limiter and method of limiting ground fault cu...
- Patent number 5,699,219
- Issue date Dec 16, 1997
- Hitachi, Ltd.
- Hiroshi Arita
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Voltage or reactive power control method and control device therefor
- Patent number 5,327,355
- Issue date Jul 5, 1994
- Hitachi, Ltd.
- Tomio Chiba
- G05 - CONTROLLING REGULATING
Information Patent Grant
Method and system of transformer protection and method and system o...
- Patent number 5,170,308
- Issue date Dec 8, 1992
- Hitachi, Ltd.
- Keizo Inagaki
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER