Granted Patent
Utility
US 5,315,520 · App. 07/756,021
Friction brake interface health check system for multiple-axle railway vehicles
Inventors:
John B. Drake, James A. Wood, Carl J. Slavick, Jr., Richard J. Mazur
Patented Case
View Patent ↗
Granted: May 24, 1994
Filed: Sep 6, 1991
Inventors
John B. Drake
James A. Wood
Carl J. Slavick, Jr.
Richard J. Mazur
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.