Patents by Inventor Gladys M. Francis

Gladys M. Francis 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).

  • Digital clock
    Patent number: D259184
    Type: Grant
    Filed: March 22, 1979
    Date of Patent: May 12, 1981
    Assignee: Microtime, Incorporated
    Inventors: Gladys M. Francis, David H. Francis