Granted Patent
Utility
US 6,535,604 · App. 09/148,149
Voice-switching device and method for multiple receivers
Inventors:
Paul Provencal, Christopher Michael Forrester
Patented Case
View Patent ↗
Granted: Mar 18, 2003
Filed: Sep 4, 1998
Inventors
Paul Provencal
Christopher Michael Forrester
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.