Patents by Inventor James DeWitt Knowles

James DeWitt Knowles 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).

  • Tire tread
    Patent number: D483322
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: December 9, 2003
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: James DeWitt Knowles, Alan Defazio, Stephen Lash
  • Tire tread
    Patent number: D572653
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: July 8, 2008
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: James DeWitt Knowles, Phillip William Check
  • Tire tread
    Patent number: D651553
    Type: Grant
    Filed: August 20, 2009
    Date of Patent: January 3, 2012
    Assignee: Michelin Recherche et Technique
    Inventors: James DeWitt Knowles, Pascal Roger Germain Fickinger