TREA

Gregory C. Givler

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  • Houston, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Steering system for percussion boring tools
    • Patent number 4,632,191
    • Issue date Dec 30, 1986
    • Gas Research Institute
    • William J. McDonald
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Percussion boring tool
    • Patent number 4,621,698
    • Issue date Nov 11, 1986
    • Gas Research Institute
    • Gerard T. Pittard
    • E21 - EARTH DRILLING MINING