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Akira Wada

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  • Hitachi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Electrode for vacuum circuit breaker
    • Patent number 5,763,848
    • Issue date Jun 9, 1998
    • Hitachi, Ltd.
    • Yoshimi Hakamata
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Metal vapor laser apparatus
    • Patent number 5,117,434
    • Issue date May 26, 1992
    • Hitachi, Ltd.
    • Tuneyoshi Oohashi
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Metallic vapor laser apparatus
    • Patent number 4,991,180
    • Issue date Feb 5, 1991
    • Hitachi, Ltd.
    • Motoo Yamaguchi
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Vacuum switch and method of manufacturing the same
    • Patent number 4,546,222
    • Issue date Oct 8, 1985
    • Hitachi, Ltd.
    • Ryuji Watanabe
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Vacuum interrupter
    • Patent number 4,430,536
    • Issue date Feb 7, 1984
    • Hitachi, Ltd.
    • Yukio Kurosawa
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Vacuum interrupter
    • Patent number 4,427,857
    • Issue date Jan 24, 1984
    • Hitachi, Ltd.
    • Nobuo Abe
    • H01 - BASIC ELECTRIC ELEMENTS