Masao Ohi

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Mito, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of adjusting thermal balance of rotor
- Patent number 4,912,834
- Issue date Apr 3, 1990
- Hitachi, Ltd.
- Takashi Watanabe
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Fault diagnosis system for rotor winding of rotary electric machine
- Patent number 4,851,766
- Issue date Jul 25, 1989
- Hitachi, Ltd.
- Ryoichi Shiobara
- G01 - MEASURING TESTING
Information Patent Grant
Current-collecting brush apparatus
- Patent number 4,748,363
- Issue date May 31, 1988
- Hitachi, Ltd.
- Takashi Watanabe
- H01 - BASIC ELECTRIC ELEMENTS