Granted Patent
Utility
US 5,465,670 · App. 08/224,839
Railroad freight car having an improved structural support
Inventor:
Ronald S. Butcher
Patented Case
View Patent ↗
Granted: Nov 14, 1995
Filed: Apr 8, 1994
Inventor
Ronald S. Butcher
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.