Patents by Inventor Richard L. Double

Richard L. Double 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: D252496
    Type: Grant
    Filed: July 13, 1977
    Date of Patent: July 31, 1979
    Inventor: Richard L. Double