TREA

Paul W. Crites

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  • Broken Arrow, OK, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Percussion drill assembly
    • Patent number 6,047,778
    • Issue date Apr 11, 2000
    • Dresser-Rand Company
    • James E. Coffman
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Percussion drill assembly
    • Patent number 5,957,220
    • Issue date Sep 28, 1999
    • Dresser-Rand Company
    • James E. Coffman
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Percussion drill assembly
    • Patent number 5,662,180
    • Issue date Sep 2, 1997
    • Dresser-Rand Company
    • James E. Coffman
    • E21 - EARTH DRILLING MINING