Granted Patent
Utility
US 5,669,674 · App. 08/654,849
Electro-pneumatic freight brake control system
Inventors:
Albert A. McKay, Eric G. Smith
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: May 29, 1996
Inventors
Albert A. McKay
Eric G. Smith
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.