Patents by Inventor Hans O. G. Ehrich

Hans O. G. Ehrich 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).

  • Toothbrush
    Patent number: D309375
    Type: Grant
    Filed: March 24, 1988
    Date of Patent: July 24, 1990
    Assignee: Colgate-Palmolive Company
    Inventors: Tom E. T. Ahlstroem, Hans O. G. Ehrich