TREA

Friedrich Lenze

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  • Dusseldorf, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pipe connector
    • Patent number 6,585,299
    • Issue date Jul 1, 2003
    • Mannesmann AG
    • Erich Quadflieg
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pipe connector
    • Patent number 6,511,102
    • Issue date Jan 28, 2003
    • Vallourec Mannesmann Oil & Gas Germany GmbH
    • Gerhard Krug
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pipe joint
    • Patent number 6,155,613
    • Issue date Dec 5, 2000
    • Mannesmann Aktiengesellschaft
    • Erich Quadflieg
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pipeline with threaded pipes and a sleeve connecting the same
    • Patent number 5,394,823
    • Issue date Mar 7, 1995
    • Mannesmann Aktiengesellschaft
    • Friedrich Lenze
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Gas-tight pipe connection
    • Patent number 5,275,445
    • Issue date Jan 4, 1994
    • Mannesmann Aktiengesellschaft
    • Rainer Krings
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Screwed pipe joint
    • Patent number 5,048,871
    • Issue date Sep 17, 1991
    • Mannesmann Aktiengesellschaft
    • Gerd Pfeiffer
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Drill pipe coupling
    • Patent number 4,955,644
    • Issue date Sep 11, 1990
    • Mannesmann Aktiengellschaft
    • Gerd Pfeiffer
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Fluidtight pipe joint
    • Patent number 4,611,838
    • Issue date Sep 16, 1986
    • Mannesmann Aktiengesellschaft
    • Wolfgang Heilmann
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Gas tightly sealed joint in oil field tubular goods
    • Patent number 4,595,219
    • Issue date Jun 17, 1986
    • Mannesmann Aktiengesellschaft
    • Friedrich Lenze
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Method for surface treatment of threading
    • Patent number 4,414,247
    • Issue date Nov 8, 1983
    • Mannesmann Aktiengesellschaft
    • Hans Hubecker
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    Pipe connector
    • Publication number 20020017788
    • Publication date Feb 14, 2002
    • Gerhard Krug
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...