Hiroaki Kuroha

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Katsuta, JP

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Patents Grantslast 30 patents

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AC-to-DC power converter with improved power factor and overvoltage...
- Patent number 4,584,636
- Issue date Apr 22, 1986
- Hitachi, Ltd.
- Takeki Ando
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Power converter apparatus
- Patent number 4,361,866
- Issue date Nov 30, 1982
- Hitachi, Ltd.
- Seiya Shima
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Speed control system for a motor
- Patent number 4,263,988
- Issue date Apr 28, 1981
- Hitachi, Ltd.
- Hiromi Inaba
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Safety apparatus for elevator system
- Patent number 4,256,204
- Issue date Mar 17, 1981
- Hitachi, Ltd.
- Takeki Ando
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Fault detecting system for a control system
- Patent number 4,171,505
- Issue date Oct 16, 1979
- Hitachi, Ltd.
- Seiya Shima
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Thyristor fault-detecting apparatus
- Patent number 4,133,018
- Issue date Jan 2, 1979
- Hitachi, Ltd.
- Mutsuhiro Terunuma
- G01 - MEASURING TESTING