TREA

Osamu Arai

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  • Takasago-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Drilling device for earth drill
    • Patent number 7,032,692
    • Issue date Apr 25, 2006
    • Hitachi Construction Co., Ltd.
    • Satoshi Nozaki
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

Patents Applicationslast 30 patents

  • Information Patent Application

    Drilling device for earth drill
    • Publication number 20040168831
    • Publication date Sep 2, 2004
    • Satoshi Nozaki
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING