Granted Patent
Utility
US 5,832,839 · App. 08/641,366
Curved flange sidewall construction for railcar end structure
Inventor:
James W. Forbes
Patented Case
View Patent ↗
Granted: Nov 10, 1998
Filed: Apr 30, 1996
Inventor
James W. Forbes
Assignee (at issue)
National Steel Car Limited
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.