Granted Patent
Utility
US 5,291,560 · App. 07/729,638
Biometric personal identification system based on iris analysis
Inventor:
John Daugman
Patented Case
View Patent ↗
Granted: Mar 1, 1994
Filed: Jul 15, 1991
Inventor
John Daugman
Assignee (at issue)
IriScan, 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.