Kei Katayama

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Pump turbine, method of controlling thereof, and method of stopping...
- Patent number 6,602,044
- Issue date Aug 5, 2003
- Takao Kuwabara
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information Patent Grant
Method of controlling a pump turbine
- Patent number 6,336,322
- Issue date Jan 8, 2002
- Hitachi, Ltd.
- Takao Kuwabara
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...