TREA

Tsutomu Sugiyama

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  • Amagasaki, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hydraulic control valve apparatus
    • Patent number 4,887,511
    • Issue date Dec 19, 1989
    • Mitsubishi Denki Kabushiki Kaisha
    • Tsutomu Sugiyama
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Hydraulic operating apparatus for electric circuit breaker
    • Patent number 4,785,712
    • Issue date Nov 22, 1988
    • Mitsubishi Denki Kabushiki Kaisha
    • Toshiaki Yoshizumi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Tank-type switchgear
    • Patent number 4,652,708
    • Issue date Mar 24, 1987
    • Mitsubishi Denki Kabushiki Kaisha
    • Michiharu Okuno
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER