TREA

Masanori Tsukushi

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  • Hitachi, JA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Puffer type gas circuit breaker
    • Patent number 4,059,741
    • Issue date Nov 22, 1977
    • Hitachi, Ltd.
    • Yoshio Yoshioka
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Circuit breaker
    • Patent number 3,946,184
    • Issue date Mar 23, 1976
    • Hitachi, Ltd.
    • Yoshio Yoshioka
    • H01 - BASIC ELECTRIC ELEMENTS