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David A. Krug

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  • Fairview, OR, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rod pumping surface unit
    • Patent number 12,037,997
    • Issue date Jul 16, 2024
    • David A. Krug
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Method and apparatus for autonomous oil and gas well down-hole pump...
    • Patent number 8,844,626
    • Issue date Sep 30, 2014
    • Rodmax Oil & Gas, Inc.
    • David A. Krug
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Regenerative hydraulic lift system
    • Patent number 8,562,308
    • Issue date Oct 22, 2013
    • Rodmax Oil & Gas, Inc.
    • David A. Krug
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Regenerative hydraulic lift system
    • Patent number 8,083,499
    • Issue date Dec 27, 2011
    • QuaLift Corporation
    • David A. Krug
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL

Patents Applicationslast 30 patents