Granted Patent
Utility
US 5,333,941 · App. 07/976,823
High pressure valve for railway car brake control valve device
Inventors:
James E. Hart, John B. Carroll
Patented Case
View Patent ↗
Granted: Aug 2, 1994
Filed: Nov 16, 1992
Inventors
James E. Hart
John B. Carroll
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.