Granted Patent
Utility
US 6,424,635 · App. 09/190,377
Adaptive nonlinear processor for echo cancellation
Inventor:
Wei Song
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Nov 10, 1998
Inventor
Wei Song
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.