Patents by Inventor Wilfried Siefer

Wilfried Siefer 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).

  • Compression measuring device
    Patent number: 4468970
    Abstract: An apparatus for the approximate determination of forces acting on a support frame which has a compression member disposed between two pressure plates. The compression member has a coating of a material such as enamel which separates from the member as a function of the members' deformation under compressive forces and thus is an indicator of the magnitude of such forces.
    Type: Grant
    Filed: June 9, 1982
    Date of Patent: September 4, 1984
    Assignee: Bergwerksverband GmbH
    Inventors: Joachim Leonhardt, Bruno Wagener, Hans-Dieter Klein, Wilfried Siefer, Dieter Orbach