TREA

Douglas B. Edwards

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  • West Burlington, IA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pulsation dampener
    • Patent number 4,979,441
    • Issue date Dec 25, 1990
    • Elmer S. Welch
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...