Patents by Inventor Rudolf Hartjes

Rudolf Hartjes 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).

  • Golf shoe
    Patent number: 4715133
    Abstract: A golf shoe is proposed which has a sole that is provided with spikes. To permit the golf shoe to perform effectively as a walking shoe and as a striking shoe, each spike is inserted in and axially movable relative to the sole and on top of the sole comprises a pressure-applying plate which bears on the top of a resilient abutment.
    Type: Grant
    Filed: June 13, 1986
    Date of Patent: December 29, 1987
    Inventors: Rudolf Hartjes, Gunter Graber