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Thomas J. Shaefer

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  • Buffalo, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Priming piston pump piston check valve
    • Patent number 5,147,188
    • Issue date Sep 15, 1992
    • Graco Inc.
    • Thomas J. Shaefer
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...