Patents by Inventor Dennis Marsden

Dennis Marsden 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).

  • Trackside cam centering arrangement
    Patent number: 4335988
    Abstract: A trackside door closing arrangement for closing the swinging doors of a railway hopper car. This arrangement is self centering and shifts to counteract the cars lateral sway as it passes through the mechanism or shifts to accommodate cars that have parallelogramed during service.
    Type: Grant
    Filed: June 26, 1980
    Date of Patent: June 22, 1982
    Assignee: Pullman Incorporated
    Inventor: Dennis Marsden