Granted Patent
Utility
US 5,713,639 · App. 08/607,016
Brake control device for railroad rolling stock
Inventors:
Shigeaki Doto, Asaji Imanaka
Patented Case
View Patent ↗
Granted: Feb 3, 1998
Filed: Feb 26, 1996
Inventors
Shigeaki Doto
Asaji Imanaka
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.