Granted Patent
Utility
US 5,689,552 · App. 08/115,366
Telephone calling with automatic billing
Inventor:
Paul F. Gibilisco
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: Aug 31, 1993
Inventor
Paul F. Gibilisco
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.