Granted Patent
Utility
US 5,330,134 · App. 07/882,605
Railway cab signal
Inventor:
Anthony G. Ehrlich
Patented Case
View Patent ↗
Granted: Jul 19, 1994
Filed: May 13, 1992
Inventor
Anthony G. Ehrlich
Assignee (at issue)
Union Switch & Signal, Inc.
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.