Granted Patent
Utility
US 5,366,183 · App. 08/012,007
Railway signalling system
Inventor:
David C. Gill
Patented Case
View Patent ↗
Granted: Nov 22, 1994
Filed: Feb 1, 1993
Inventor
David C. Gill
Assignee (at issue)
Westinghouse Brake and Signal Holdings Limited
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.