Kenzyu Ogiwara

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Variable-speed pumped-storage power generating system
- Patent number 4,816,696
- Issue date Mar 28, 1989
- Hitachi, Ltd.
- Akihiro Sakayori
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Method of operating water-turbine or pump water-turbine
- Patent number 4,468,167
- Issue date Aug 28, 1984
- Hitachi, Ltd.
- Kenzyu Ogiwara
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Method for operating fluid machines in spinning-in-air mode
- Patent number 4,295,781
- Issue date Oct 20, 1981
- Hitachi, Ltd.
- Kenzyu Ogiwara
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Method for controlling the operation of a fluid machine in spinning...
- Patent number 4,179,237
- Issue date Dec 18, 1979
- Hitachi, Ltd.
- Kenzyu Ogiwara
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...