Granted Patent
Utility
US 5,867,569 · App. 08/534,668
Enhanced efficient telephone number portability
Inventors:
Edgar Martinez, Locillo Giuseppe Pino, Charles Richard Wiebe
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Sep 27, 1995
Inventors
Edgar Martinez
Locillo Giuseppe Pino
Charles Richard Wiebe
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.