Granted Patent
Utility
US 4,731,867 · App. 06/854,376
Vehicle communication system using existing roadway loops
Inventors:
Thomas W. Seabury, Thomas Potter
Patented Case
View Patent ↗
Granted: Mar 15, 1988
Filed: Apr 21, 1986
Inventors
Thomas W. Seabury
Thomas Potter
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.