TREA

Masakazu Akiyama

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  • Hitachinaka, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Signaling safety system
    • Patent number 7,201,350
    • Issue date Apr 10, 2007
    • Hitachi, Ltd.
    • Yoichi Sugita
    • B61 - RAILWAYS

Patents Applicationslast 30 patents

  • Information Patent Application

    Signaling safety system
    • Publication number 20050133673
    • Publication date Jun 23, 2005
    • Hitachi, Ltd
    • Yoichi Sugita
    • B61 - RAILWAYS