TREA

David R. Marr, Jr.

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  • Fort Collins, CO, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Roof bolt plate
    • Patent number 7,597,505
    • Issue date Oct 6, 2009
    • Herbert S. Price
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Method for supporting a subsurface material
    • Patent number 7,510,351
    • Issue date Mar 31, 2009
    • Herbert S. Price
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Liquid well stimulator
    • Patent number 7,293,608
    • Issue date Nov 13, 2007
    • Clifton M. Dudley
    • E21 - EARTH DRILLING MINING