Patents by Inventor Otto-Alfred Barbian

Otto-Alfred Barbian 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).

  • Device for testing ferromagnetic materials
    Patent number: 6009756
    Abstract: Device for testing ferromagnetic materials, such as pipelines and the like, for faults, cracks, corrosion, etc. An one electromagnetic ultrasonic transducer includes at least one high frequency current coil and an arraay of permanent magnets which create a magnetic field for exciting and/or detecting ultrasonic waves in the wall of the ferromagnetic material. The ultrasonic transducer is located between the pole pieces of an additional magnet arrangement that produces a magnetic prefield in the material wall.
    Type: Grant
    Filed: July 11, 1997
    Date of Patent: January 4, 2000
    Assignees: Pipetronix BmbH, Fraunhofer- Esellschaft Zur Forderung Der Angewandten Forschung
    Inventors: Herbert Willems, Otto-Alfred Barbian, Gerhard Hubschen