Granted Patent
Utility
US 5,028,921 · App. 07/333,824
Vehicle detector method and system
Inventor:
Thomas Potter
Patented Case
View Patent ↗
Granted: Jul 2, 1991
Filed: Apr 4, 1989
Inventor
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.