TREA

Nicholas A. Hynd

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  • Tempe, AZ, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Shaft boring machine and method
    • Patent number 4,646,853
    • Issue date Mar 3, 1987
    • The Robbins Company
    • David B. Sugden
    • E21 - EARTH DRILLING MINING