Granted Patent
Utility
US 5,823,638 · App. 08/642,569
Microprocessor controlled electro-pneumatic brake system in a multi-platform railroad freight car
Inventors:
Gary M. Sich, John E. Paul
Patented Case
View Patent ↗
Granted: Oct 20, 1998
Filed: May 3, 1996
Inventors
Gary M. Sich
John E. Paul
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.