Granted Patent
Utility
US 5,439,276 · App. 08/128,966
Tamper-resistant independent brake valve device for locomotive air brake equipment
Inventors:
Frank J. Jerina, Michael E. Romansky, Dale A. Chovan
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: Sep 30, 1993
Inventors
Frank J. Jerina
Michael E. Romansky
Dale A. Chovan
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.