Granted Patent
Utility
US 4,880,964 · App. 06/620,741
Scannable fraud preventing coupon
Inventor:
Patrick J. Donahue
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Jun 14, 1984
Inventor
Patrick J. Donahue
Assignee (at issue)
Beatrice Foods Co.
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.