Granted Patent
Utility
US 5,757,291 · App. 08/524,985
Integrated proximity warning system and end of train communication system
Inventor:
Robert C. Kull
Patented Case
View Patent ↗
Granted: May 26, 1998
Filed: Sep 8, 1995
Inventor
Robert C. Kull
Assignee (at issue)
Pulse Electornics, 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.