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Donald R. Petrash

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  • Highlands, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Diverter flow line seal
    • Patent number 6,290,231
    • Issue date Sep 18, 2001
    • ABB Vetco Gray, Inc.
    • Donald R. Petrash
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Diverter flow line seal
    • Patent number 5,890,535
    • Issue date Apr 6, 1999
    • ABB Vetco Gray Inc.
    • Donald R. Petrash
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents