TREA

Junichi Tsuzuki

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  • Seijo, Setagaya-ku, Tokyo 157, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Tunnel shield structure
    • Patent number 4,558,970
    • Issue date Dec 17, 1985
    • Junichi Tsuzuki
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Tunnel wall structure
    • Patent number 4,545,701
    • Issue date Oct 8, 1985
    • Junichi Tsuzuki
    • E21 - EARTH DRILLING MINING