Patents by Inventor John H. Bishopp

John H. Bishopp 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).

  • Vandal guard sheet
    Patent number: 4090464
    Abstract: A sheet of clear plastic or vinyl type material having a clear adhesive covering the entire one side thereof so to adhere to a front of a roadway sign and prevent it from becoming defaced by vandals having spray cans of paint; the sheet being readily peeled off and replaced by a fresh sheet after being excessively defaced.
    Type: Grant
    Filed: June 25, 1975
    Date of Patent: May 23, 1978
    Inventors: John H. Bishopp, George Spector