Patents by Inventor Matthias Detlef Janssen

Matthias Detlef Janssen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Riser and tubular inspection systems
    Patent number: 6931748
    Abstract: A system for measuring inner diameter of a tubular, e.g., but not limited to, a riser or a pipe, the system including at least one linear distance measuring device movable through a hollow tubular, a main body also movable through said tubular, the at least one linear distance measuring device mounted on the main body, and the at least one linear distance measuring device for producing a measurement signal indicative of a measurement of inner diameter of the tubular.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: August 23, 2005
    Inventors: Clive Chemo Lam, Manfred Hermann Worms, Helmut Wolfgang Knapwost, Bernd Helmut Dobberstein, Reinhold Kammann, Matthias Detlef Janssen
  • Riser and tubular inspection systems
    Publication number: 20040016139
    Abstract: A system for measuring inner diameter of a tubular, e.g., but not limited to, a riser or a pipe, the system including at least one linear distance measuring device movable through a hollow tubular, a main body also movable through said tubular, the at least one linear distance measuring device mounted on the main body, and the at least one linear distance measuring device for producing a measurement signal indicative of a measurement of inner diameter of the tubular.
    Type: Application
    Filed: April 1, 2003
    Publication date: January 29, 2004
    Inventors: Clive Chemo Lam, Manfred Hermann Worms, Helmut Wolfgang Knapwost, Bernd Helmut Dobberstein, Reinhold Kammann, Matthias Detlef Janssen