Granted Patent
Utility
US 4,846,332 · App. 07/162,190
Counterfeit coin detector circuit
Inventor:
Thomas J. Quinlan, Jr.
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Feb 29, 1988
Inventor
Thomas J. Quinlan, Jr.
Assignee (at issue)
Automatic Toll 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.