Granted Patent
Utility
US 5,537,486 · App. 07/612,557
High-speed document verification system
Inventors:
William N. Stratigos, Stephen R. Landau
Patented Case
View Patent ↗
Granted: Jul 16, 1996
Filed: Nov 13, 1990
Inventors
William N. Stratigos
Stephen R. Landau
Assignees (at issue)
Empire Blue Cross/Blue Shield
Sigma Imaging 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.