Granted Patent
Utility
US 5,485,520 · App. 08/132,984
Automatic real-time highway toll collection from moving vehicles
Inventors:
David Chaum, Peter L. Hendrick
Patented Case
View Patent ↗
Granted: Jan 16, 1996
Filed: Oct 7, 1993
Inventors
David Chaum
Peter L. Hendrick
Assignee (at issue)
AMTECH, LLC
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.