Patents by Inventor Robert Herff

Robert Herff 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).

  • Electrical overhead cable rope comprising an integrated optical communication lead
    Patent number: 5082379
    Abstract: The invention relates to an electrical overhead cable rope comprising an integrated optical communication lead (13), in which metallic wire elements (14, 15, 16) surround a tube (1) or noble steel, in which at least one optical waveguide (2) is contained. Corrosion of the wire elements of the overhead cable rope is prevented by providing a tube (1) of noble steel having applied to it a water-tight coating which establishes a continuous electrically conducting connection between the tube of noble steel and the wire elements (14, 15, 16) surrounding it.
    Type: Grant
    Filed: January 2, 1991
    Date of Patent: January 21, 1992
    Assignee: U.S. Philips Corp.
    Inventors: Helmut Lindner, Norbert Wenzel, Robert Herff, Hans-Joachim Schmitz