Patents by Inventor Martha D. Hoffman

Martha D. Hoffman 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).

  • Christmas tree
    Patent number: D354928
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: January 31, 1995
    Inventors: Martha D. Hoffman, C. Daniel Compo