Patents by Inventor Maurice L. MacDougall

Maurice L. MacDougall 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).

  • Low level freight car
    Patent number: 4686907
    Abstract: A low-level freight car for carrying trailers and containers at a low overall height combines a low center sill with relatively light side sill assemblies to provide a rigid structure having low deflection characteristics under the expected buff, draft and vertical load combinations, while keeping overall tare weight to reasonable levels and providing an adequate safety factor.
    Type: Grant
    Filed: November 12, 1985
    Date of Patent: August 18, 1987
    Assignee: Hawker Siddeley Canada, Inc.
    Inventors: Ronald F. Woollam, Maurice L. MacDougall