Granted Patent
Utility
US 5,442,689 · App. 08/010,950
Apparatus and method for providing services prior to call completion in a telecommuncation system
Inventors:
Anthony Buttitta, Eric A. Duesing, Wayne R. Kalbow, Mark O. Rosstedt, Liane Toy Tsai
Patented Case
View Patent ↗
Granted: Aug 15, 1995
Filed: Jan 29, 1993
Inventors
Anthony Buttitta
Eric A. Duesing
Wayne R. Kalbow
Mark O. Rosstedt
Liane Toy Tsai
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.