Patents by Inventor Frank H. Knapp

Frank H. Knapp 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: 4348823
    Abstract: A pair of collapsibly foldable snowshoes for walking upon deep or shallow snow; each shoe including a tubular frame consisting of interfitted sections that snapfit rigidly together for use, a flexible endless cord passed through all the sections for holding them together in tension, a web inside the frame consisting of separate fillers at front, center and near sections, and cleats on an underside of the fillers for traction against slipping on a snow; the frame supporting shoe bungees.
    Type: Grant
    Filed: July 24, 1980
    Date of Patent: September 14, 1982
    Inventors: Frank H. Knapp, George Spector