Granted Patent
Utility
US 5,563,939 · App. 08/164,521
Method and system for delivering a communication service
Inventors:
Thomas F. La Porta, Malathi Veeraraghavan
Patented Case
View Patent ↗
Granted: Oct 8, 1996
Filed: Dec 9, 1993
Inventors
Thomas F. La Porta
Malathi Veeraraghavan
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.