Patents by Inventor Doreen M. Hitchens

Doreen M. Hitchens 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: D247881
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: May 16, 1978
    Inventor: Doreen M. Hitchens