Hideyasu Umetsu

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electric power converter
- Patent number 6,084,785
- Issue date Jul 4, 2000
- Hitachi, Ltd.
- Hideaki Kunisada
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electric power conversion apparatus
- Patent number 5,959,858
- Issue date Sep 28, 1999
- Hitachi, Ltd.
- Akihiko Kanouda
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for power converting AC into DC or DC into AC...
- Patent number 5,892,674
- Issue date Apr 6, 1999
- Hitachi, Ltd.
- Keizo Shimada
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER