Patents by Inventor Dennis D. Campbell

Dennis D. Campbell 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).

  • Automobile
    Patent number: D283497
    Type: Grant
    Filed: October 12, 1983
    Date of Patent: April 22, 1986
    Inventors: Stewart D. Reed, Dennis D. Campbell
  • Automobile
    Patent number: D318032
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: July 9, 1991
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Dennis D. Campbell, Erwin K. Lui
  • Automobile
    Patent number: D331731
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: December 15, 1992
    Assignee: Toyota Jidosha K.K.
    Inventors: Dennis D. Campbell, Masahiko Kawatsu