Granted Patent
Utility
US 6,188,886 · App. 09/090,189
Server based voice call offer while telephone in data session
Inventors:
Robert P. Macaulay, Brian B. Egan
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Jun 4, 1998
Inventors
Robert P. Macaulay
Brian B. Egan
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.