Patents by Inventor Douglas R. Zimmermann

Douglas R. Zimmermann 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).

  • Waffle bar
    Patent number: D440737
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: April 24, 2001
    Assignee: Kellogg Company
    Inventors: Gerald I. Johnson, Deidre E. Bath, Charles A. Smith, Charles S. Gambino, Douglas R. Zimmermann
  • Waffle product
    Patent number: D373452
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: September 10, 1996
    Assignee: Kellogg Company
    Inventors: Harold Gobble, Michael Bauman, Gerry Johnson, Douglas R. Zimmermann
  • Waffle
    Patent number: D374755
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: October 22, 1996
    Assignee: Kellogg Company
    Inventors: Harold Gobble, Michael Bauman, Gerry Johnson, Douglas R. Zimmermann