Granted Patent
Utility
US 5,867,559 · App. 08/603,231
Real-time, on-line, call verification system
Inventors:
Jacob W. Jorgensen, Stephen D. Peavey, Donald Grailich, Andrew P. Heron
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Feb 20, 1996
Inventors
Jacob W. Jorgensen
Stephen D. Peavey
Donald Grailich
Andrew P. Heron
Assignee (at issue)
EIS 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.