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Robert H. Wittman

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  • Houston, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Mud motor coupling system
    • Patent number 10,288,065
    • Issue date May 14, 2019
    • National-Oilwell DHT, L.P.
    • John P. Smid
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Monolithic isolation stress joint
    • Patent number 6,467,545
    • Issue date Oct 22, 2002
    • Shell Oil Company
    • Gouri Venkataraman
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Joint for applying current across a pipe-in-pipe system
    • Patent number 6,315,497
    • Issue date Nov 13, 2001
    • Shell Oil Company
    • Robert Henry Wittman
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Collet actuated ball and socket connector
    • Patent number 4,477,105
    • Issue date Oct 16, 1984
    • Hughes Tool Company
    • Robert H. Wittman
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pressure energized pipeline plug
    • Patent number 4,465,104
    • Issue date Aug 14, 1984
    • Hughes Tool Company
    • Robert H. Wittman
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pressure energized pipeline plug
    • Patent number 4,422,477
    • Issue date Dec 27, 1983
    • Hughes Tool Company
    • Robert H. Wittman
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pipeline pigging plug
    • Patent number 4,332,277
    • Issue date Jun 1, 1982
    • Hughes Undersea Coupling, Inc.
    • David E. Adkins
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pipe coupling with improved seal means
    • Patent number 4,078,832
    • Issue date Mar 14, 1978
    • HydroTech International, Inc.
    • Robert H. Wittman
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents