TREA

Ludvig Naess

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Patents Grantslast 30 patents

  • Information Patent Grant

    Device with a valve function
    • Patent number 4,941,511
    • Issue date Jul 17, 1990
    • Den Norske Stats Oljeselskap A.S.
    • Trond V. Johansen
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pipeline vehicle
    • Patent number 4,852,391
    • Issue date Aug 1, 1989
    • Den Norske Stats Oljeselskap A.S.
    • Ola Ruch
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Shut-off device which can be inserted into a pipeline
    • Patent number 4,852,614
    • Issue date Aug 1, 1989
    • Den Norske Stats Oljeselskap A.S.
    • Trond V. Johansen
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...