Granted Patent
Utility
US 5,684,489 · App. 08/603,426
Position-finding apparatus for locating a vehicle travelling along means for propagating electromagnetic waves
Inventor:
Denis Fournier
Patented Case
View Patent ↗
Granted: Nov 4, 1997
Filed: Feb 20, 1996
Inventor
Denis Fournier
Assignee (at issue)
GEC Alsthom Transport SA
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.