Patents by Inventor Bertha W. Hassen

Bertha W. Hassen 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).

  • Grandmother clock
    Patent number: D352249
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: November 8, 1994
    Inventor: Bertha W. Hassen