Granted Patent
Utility
US 6,665,402 · App. 09/386,281
Method and apparatus for performing echo cancellation
Inventors:
H. S. Peter Yue, Sylvain Angrignon
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Aug 31, 1999
Inventors
H. S. Peter Yue
Sylvain Angrignon
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.