TREA

Masataka Harada

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  • Hitachi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Reversible pump-turbine system
    • Patent number 6,250,887
    • Issue date Jun 26, 2001
    • Hitachi, Ltd.
    • Takao Kuwabara
    • F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
  • Information Patent Grant

    Variable speed pumping-up generator
    • Patent number 5,561,358
    • Issue date Oct 1, 1996
    • Hitachi, Ltd.
    • Takao Kuwabara
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER