Patents by Inventor Margaret Anne McDonald

Margaret Anne McDonald 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).

  • Pie tin
    Patent number: D436494
    Type: Grant
    Filed: February 14, 2000
    Date of Patent: January 23, 2001
    Inventors: Peter Ernest McDonald, Margaret Anne McDonald, John Edwin Milligan
  • Pie tin
    Patent number: D423276
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: April 25, 2000
    Inventors: Peter Ernest McDonald, Margaret Anne McDonald