Patents by Inventor John Barclay Ledingham

John Barclay Ledingham 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).

  • Messaging device
    Patent number: D440959
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: April 24, 2001
    Assignee: Motorola, Inc.
    Inventors: Monika Romana Wolf, John Barclay Ledingham, Paul Lynn Fordham, Charles Alan Actor, Heidi Hildegard Klier
  • Griddle
    Patent number: D533016
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: December 5, 2006
    Assignee: Whirlpool Corporation
    Inventors: Kristina Jean Genslak, Ben Chengyuan Shao, Todd William Zazelenchuk, John Barclay Ledingham
  • Slow cooker
    Patent number: D537670
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: March 6, 2007
    Assignee: Whirlpool Corporation
    Inventors: Kristina Jean Genslak, John Barclay Ledingham