Granted Patent
Utility
US 6,494,409 · App. 10/068,719
Railway code following apparatus
Inventor:
Raymond C. Franke
Patented Case
View Patent ↗
Granted: Dec 17, 2002
Filed: Feb 6, 2002
Inventor
Raymond C. Franke
Assignee (at issue)
Union Switch & Signal, 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.