TREA

William R. Evenson

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  • South Houston, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Vacuum assisted material mover
    • Patent number 4,924,898
    • Issue date May 15, 1990
    • The GNI Group, Inc.
    • William R. Evenson
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Pumping system with air conveyance and method
    • Patent number 4,659,293
    • Issue date Apr 21, 1987
    • Lefco Western, Inc.
    • William R. Evenson
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Evacuated pumping system
    • Patent number 4,613,290
    • Issue date Sep 23, 1986
    • Lefco Western, Inc.
    • William R. Evenson
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...