Patents by Inventor Arthur D. Douglas

Arthur D. Douglas 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).

  • Tab and notch locator for exhaust systems
    Patent number: 5290974
    Abstract: A system is provided for orienting two engaged exhaust pipes or conduits and maintaining a proper orientation between those pipes after engagement to provide a proper alignment between the pipes. The system includes a tab formed on one of the pipes and a tab-receiving notch formed on the other of the pipes.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: March 1, 1994
    Assignee: Arvin Industries, Inc.
    Inventors: Arthur D. Douglas, Freddie A. Baldwin, Alan L. Brittingham