Patents by Inventor William J. Calderwood

William J. Calderwood 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).

  • Utensil handle
    Patent number: D440816
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: April 24, 2001
    Assignee: World Kitchen, Inc.
    Inventors: Richard L. Sassone, John E. Armando, William J. Calderwood
  • Utensil handle
    Patent number: D440817
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: April 24, 2001
    Assignee: World Kitchen, Inc.
    Inventors: John E. Armando, Richard L. Sassone, William J. Calderwood
  • Napkin holder
    Patent number: D450543
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: November 20, 2001
    Assignee: World Kitchen, Inc.
    Inventors: Pamela S. Hannum, Charles E. Buchanan, John Szeto, William J. Calderwood
  • Handle for cheese grater
    Patent number: D457780
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: May 28, 2002
    Assignee: World Kitchen, Inc.
    Inventors: Pamela S. Hannum, Charles E. Buchanan, John Szeto, William J. Calderwood