TREA

John S. Hasslen III

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  • Elk River, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sensor mount for sump draining apparatus
    • Patent number 6,729,848
    • Issue date May 4, 2004
    • John S. Hasslen
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Sump draining apparatus
    • Patent number 4,992,030
    • Issue date Feb 12, 1991
    • John S. Hasslen
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Sump draining apparatus
    • Patent number 4,966,534
    • Issue date Oct 30, 1990
    • John S. Hasslen
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents