Patents by Inventor Walter D. Appel

Walter D. Appel 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: 4028770
    Abstract: A windshield wiper assembly is disclosed as comprising a one-piece blade superstructure fabricated of a molded polymeric material having a curvalinear shape such that uniform wiping pressure is applied along its entire length as a result of a force being exerted at the center of the superstructure by means of an ancillary wiper arm, the superstructure being provided with a resilient windshield engaging wiper blade which is secured to the superstructure by a coextensive retainer member adapted to be secured to the superstructure by means of a plurality of longitudinally spaced retaining finger formed integrally of the superstructure.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: June 14, 1977
    Inventor: Walter D. Appel