TREA

Carl R. Calhoun

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  • Midland, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Valve seat and method of repair
    • Patent number 5,139,042
    • Issue date Aug 18, 1992
    • Carl R. Calhoun
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Valve seat and method of repair
    • Patent number 5,048,558
    • Issue date Sep 17, 1991
    • Carl R. Calhoun
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...