TREA

Shunji Tokuyama

Follow

Person

  • Hitachi, JP
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Grounding switch gear device
    • Patent number 5,543,597
    • Issue date Aug 6, 1996
    • Hitachi, Ltd.
    • Atsuji Watanabe
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    DC circuit breaker
    • Patent number 4,618,905
    • Issue date Oct 21, 1986
    • Hitachi, Ltd.
    • Shunji Tokuyama
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    High-voltage DC circuit breaker apparatus
    • Patent number 4,578,730
    • Issue date Mar 25, 1986
    • Hitachi, Ltd.
    • Shunji Tokuyama
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    D.C. Circuit breaker
    • Patent number 4,216,513
    • Issue date Aug 5, 1980
    • Hitachi, Ltd.
    • Shunji Tokuyama
    • H01 - BASIC ELECTRIC ELEMENTS