Patents by Inventor Ralph Burfien

Ralph Burfien 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: D603324
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: November 3, 2009
    Assignee: Continental Aktiengesellschaft
    Inventors: Oliver Woidtke, Ulrich Behr, Ralph Burfien
  • Tire tread
    Patent number: D619080
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: July 6, 2010
    Assignee: Continental Aktiengesellschaft
    Inventors: Oliver Woidtke, Ulrich Behr, Ralph Burfien