TREA

Robert L. Esvang

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  • Schaumburg, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Air throttling valve for submerged pump system
    • Patent number 4,834,621
    • Issue date May 30, 1989
    • Apco/Valve and Primer Corporation
    • Keith Hall
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Air release valve
    • Patent number 4,586,528
    • Issue date May 6, 1986
    • APCO Valve and Primer Corporation
    • Lewis B. Andres
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...