Granted Patent
Utility
US 4,280,596 · App. 06/080,843
Air brake arrangement for center sill-less hopper cars
Inventor:
Roy W. Miller
Patented Case
View Patent ↗
Granted: Jul 28, 1981
Filed: Oct 1, 1979
Inventor
Roy W. Miller
Assignee (at issue)
The Pullman Company LLC
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.