TREA

Julian D. Keithahn

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  • Houston, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Flow control apparatus
    • Patent number 4,635,678
    • Issue date Jan 13, 1987
    • Hydril Company
    • Charles P. Peterman
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Annular blowout preventer packing unit
    • Patent number 4,605,195
    • Issue date Aug 12, 1986
    • Hydril Company
    • James A. Burton
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Flow diverter
    • Patent number 4,444,250
    • Issue date Apr 24, 1984
    • Hydril Company
    • Julian D. Keithahn
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Ball type valve having improved redundant sealing system
    • Patent number 4,342,330
    • Issue date Aug 3, 1982
    • Hydril Company
    • Raymond Wieveg
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...