TREA

Fujio Ishikawa

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Quadruple frequency converter
    • Patent number 4,160,925
    • Issue date Jul 10, 1979
    • Toyo Denki Seizo Kabushiki Kaisha
    • Fujio Ishikawa
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Treble frequency converter
    • Patent number 4,155,114
    • Issue date May 15, 1979
    • Toyo Denki Seizo Kabushiki Kaisha
    • Zenkichi Tsuchiya
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER