Granted Patent
Utility
US 5,941,280 · App. 08/815,422
Pneumatically driven train brake pipe pressure exhaust valve
Inventors:
James E. Hart, Angel P. Bezos
Patented Case
View Patent ↗
Granted: Aug 24, 1999
Filed: Mar 11, 1997
Inventors
James E. Hart
Angel P. Bezos
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.