Patents by Inventor Fred O. Dunkeld

Fred O. Dunkeld 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: D321431
    Type: Grant
    Filed: February 22, 1989
    Date of Patent: November 12, 1991
    Inventor: Fred O. Dunkeld