Granted Patent
Utility
US 5,089,815 · App. 07/462,890
Vehicle communication system using existing roadway loops
Inventors:
Thomas Potter, Thomas W. Seabury
Patented Case
View Patent ↗
Granted: Feb 18, 1992
Filed: Dec 28, 1989
Inventors
Thomas Potter
Thomas W. Seabury
Assignee (at issue)
Detector Systems, 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.