Granted Patent
Utility
US 5,898,769 · App. 08/816,443
Call routing based on prior telephone calls
Inventor:
Daniel Furman
Patented Case
View Patent ↗
Granted: Apr 27, 1999
Filed: Mar 12, 1997
Inventor
Daniel Furman
Assignee (at issue)
AT&T CORP.
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.