Granted Patent
Utility
US 4,046,342 · App. 05/719,337
Wayside signaling system for railroad cab signals and speed control
Inventor:
Kenneth J. Buzzard
Patented Case
View Patent ↗
Granted: Sep 6, 1977
Filed: Aug 31, 1976
Inventor
Kenneth J. Buzzard
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.