Granted Patent
Utility
US 6,147,979 · App. 08/909,893
System and method for echo cancellation in a communication system
Inventors:
Alan Dean Michel, David Lee Rowley
Patented Case
View Patent ↗
Granted: Nov 14, 2000
Filed: Aug 12, 1997
Inventors
Alan Dean Michel
David Lee Rowley
Assignee (at issue)
LUCENT TECHNOLOGIES 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.