TREA

Hiroshi Okubo

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  • Katsuta, JA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Car signaling system
    • Patent number 4,012,019
    • Issue date Mar 15, 1977
    • Hitachi, Ltd.
    • Hisakatsu Kiwaki
    • B61 - RAILWAYS