Patents by Inventor David L. Warren

David L. Warren 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).

  • Engine exhaust guard
    Patent number: D458201
    Type: Grant
    Filed: December 29, 1998
    Date of Patent: June 4, 2002
    Inventor: David L. Warren
  • Shoe signage
    Patent number: D335760
    Type: Grant
    Filed: May 16, 1990
    Date of Patent: May 25, 1993
    Assignee: Eye-D Unlimited, Inc.
    Inventors: David L. Warren, Joyce L. Cranston, Margery J. Goldman