Granted Patent
Utility
US 5,213,397 · App. 07/803,836
Freight brake control valve for railway cars
Inventor:
Vincent F. Troiani
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Dec 9, 1991
Inventor
Vincent F. Troiani
Assignee (at issue)
Westinghouse Air Brake Co.
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.