Patents by Inventor Eric Hilgendorf

Eric Hilgendorf 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).

  • Patent number: 5410821
    Abstract: The present invention is a sport shoe having a shoe upper with an interior for receiving a human foot and a bottom surface formed thereon, a removable foresole attached to a forward portion of the bottom surface of the shoe upper and having a toe receptacle for fitting against a toe area of the shoe upper, and a strap fastened to one side of the removable foresole and extending over the toe area of the shoe upper so as to removably fasten the foresole to the bottom side of the shoe upper. The shoe upper has a longitudinal track formed in the bottom surface. A longitudinal strut is connected to the removable foresole and extends rearwardly therefrom. The longitudinal strut is received by the longitudinal track in the bottom surface of the shoe upper. A plurality of receptacles are formed in the bottom surface of the shoe so as to receive tab elements branching outwardly from the longitudinal strut.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: May 2, 1995
    Inventor: Eric Hilgendorf