Patents by Inventor Joan D. Harshman

Joan D. Harshman 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).

  • Baby guard for a toilet seat lid
    Patent number: D336330
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: June 8, 1993
    Inventors: Ronald K. Harshman, Joan D. Harshman