Granted Patent
Utility
US 5,209,551 · App. 07/706,473
Analog service brake response enhancing circuit for railway vehicles
Inventors:
James A. Wood, Richard J. Mazur, John W. Drake
Patented Case
View Patent ↗
Granted: May 11, 1993
Filed: May 28, 1991
Inventors
James A. Wood
Richard J. Mazur
John W. Drake
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.