Granted Patent
Utility
US 5,590,189 · App. 08/354,658
Method of operating a microprocessor controlled telephone set
Inventors:
Robert Turnbull, Kristin J. Travis, Piotr T. Goszczynski, Susan McGarry, Michel J. Brisebois
Patented Case
View Patent ↗
Granted: Dec 31, 1996
Filed: Dec 13, 1994
Inventors
Robert Turnbull
Kristin J. Travis
Piotr T. Goszczynski
Susan McGarry
Michel J. Brisebois
Assignee (at issue)
Nortel Networks Limited
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.