Hajime Nakashima

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
dv/dt Protection circuit device for an AC-DC converter apparatus
- Patent number 4,636,932
- Issue date Jan 13, 1987
- Hitachi, Ltd.
- Toshiaki Kurosawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Elevator control apparatus
- Patent number 4,629,034
- Issue date Dec 16, 1986
- Hitachi, Ltd.
- Hiromi Inaba
- B66 - HOISTING LIFTING HAULING