Granted Patent
Utility
US 6,551,039 · App. 09/658,856
Auto rack rail road car with reduced slack
Inventor:
James W. Forbes
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Sep 11, 2000
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.