Patents by Inventor David T. Littrell

David T. Littrell 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).

  • Recumbent exercise cycle
    Patent number: D342299
    Type: Grant
    Filed: July 12, 1991
    Date of Patent: December 14, 1993
    Assignee: Precor Incorporated
    Inventors: James S. Birrell, David T. Littrell, Timothy O. Armstrong
  • Cross training exerciser
    Patent number: D410978
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: June 15, 1999
    Assignee: Precor Incorporated
    Inventors: David T. Littrell, Paul D. Barker, James S. Birrell