Patents by Inventor Ronald D. Riddle

Ronald D. Riddle 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: D254971
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: May 13, 1980
    Inventor: Ronald D. Riddle