Granted Patent
Utility
US 6,641,091 · App. 10/005,231
Highway railroad crossing vehicle detection methods and systems
Inventor:
Thomas N. Hilleary
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Dec 3, 2001
Inventor
Thomas N. Hilleary
Assignee (at issue)
General Electric Company
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.