Patents by Inventor Ellen U. Schaaf

Ellen U. Schaaf 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).

  • Writing utensil
    Patent number: D542842
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: May 15, 2007
    Assignee: Euro Tax Return Mehrwertsteuererstattungen
    Inventor: Ellen U. Schaaf