Granted Patent
Utility
US 5,995,881 · App. 08/898,373
Integrated cab signal rail navigation system
Inventor:
Robert C. Kull
Patented Case
View Patent ↗
Granted: Nov 30, 1999
Filed: Jul 22, 1997
Inventor
Robert C. Kull
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.