Granted Patent
Utility
US 6,728,549 · App. 09/667,348
Switching to an improved bearer during a call connection
Inventors:
Chrisophe Guerard, Simon Baillarin
Patented Case
View Patent ↗
Granted: Apr 27, 2004
Filed: Sep 22, 2000
Inventors
Chrisophe Guerard
Simon Baillarin
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.