TREA

Erich Quadflieg

Follow

Person

  • Krefeld, DE
People

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

    Drill rod coupling
    • Patent number 6,513,840
    • Issue date Feb 4, 2003
    • Mannesmann AG
    • Gerhard Krug
    • 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

    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

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...