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Michael C. Witzgall

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  • Derry, NH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Submersible motor with shaft seals
    • Patent number 6,379,127
    • Issue date Apr 30, 2002
    • Lawrence Pumps, Inc.
    • Dale B. Andrews
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...