TREA

Don D. Duren

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  • Ponca City, OK, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    High temperature slide valve
    • Patent number 4,541,453
    • Issue date Sep 17, 1985
    • Conoco Inc.
    • Harlan G. Graf
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...