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Keith Hall

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  • Whittier, CA, 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...