Granted Patent
Utility
US 5,745,556 · App. 08/532,336
Interactive and information data services telephone billing system
Inventor:
Yzhak Ronen
Patented Case
View Patent ↗
Granted: Apr 28, 1998
Filed: Sep 22, 1995
Inventor
Yzhak Ronen
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.