Granted Patent
Utility
US 6,266,409 · App. 08/971,116
Echo canceller employing dual-H architecture having improved double-talk detection
Inventors:
Kenneth P. Laberteaux, Richard C. Younce
Patented Case
View Patent ↗
Granted: Jul 24, 2001
Filed: Nov 14, 1997
Inventors
Kenneth P. Laberteaux
Richard C. Younce
Assignee (at issue)
Tellabs Operations, Inc.
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.