TREA

Douglas Lawrence Rock

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  • Houston, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of drilling a bore hole
    • Patent number 7,571,778
    • Issue date Aug 11, 2009
    • Smith International, Inc.
    • Douglas Lawrence Rock
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Method of drilling a bore hole
    • Patent number 7,284,623
    • Issue date Oct 23, 2007
    • Smith International, Inc.
    • Douglas Lawrence Rock
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents