TREA

Hubert D. Krober

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  • Cheyenne, OK, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Power actuated valve
    • Patent number 4,323,221
    • Issue date Apr 6, 1982
    • Hubert D. Krober
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Power actuated valve
    • Patent number 4,316,596
    • Issue date Feb 23, 1982
    • Hubert D. Krober
    • E21 - EARTH DRILLING MINING