TREA

Keiji Arai

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  • Kitaibaraki, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rotor of induction motor
    • Patent number 4,777,396
    • Issue date Oct 11, 1988
    • Hitachi, Ltd.
    • Motoya Ito
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Magnetic wedge
    • Patent number 4,761,581
    • Issue date Aug 2, 1988
    • Hitachi, Ltd.
    • Masatoshi Watanabe
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER