TREA

Dewight Lavergne Cartwright

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  • Pittsford, NY, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Tunnelling head and method
    • Patent number 5,470,132
    • Issue date Nov 28, 1995
    • Dewight L. Cartwright
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents