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David G. von Hollen

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  • Odessa, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pumping unit with speed reducing means
    • Patent number 5,829,958
    • Issue date Nov 3, 1998
    • BeauTech, Inc.
    • David G. von Hollen
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...