Granted Patent
Utility
US 6,820,201 · App. 09/631,893
System and method using information-based indicia for securing and authenticating transactions
Inventors:
Patrick D. Lincoln, Natarajan Shankar
Patented Case
View Patent ↗
Granted: Nov 16, 2004
Filed: Aug 4, 2000
Inventors
Patrick D. Lincoln
Natarajan Shankar
Assignee (at issue)
SRI INTERNATIONAL
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.