Granted Patent
Utility
US 5,326,159 · App. 08/132,261
Quick service limiting valve for freight brake control valve device
Inventors:
James E. Hart, Edward W. Gaughan
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Oct 6, 1993
Inventors
James E. Hart
Edward W. Gaughan
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.