Granted Patent
Utility
US 6,442,275 · App. 09/154,991
Echo canceler including subband echo suppressor
Inventor:
Eric John Diethorn
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Sep 17, 1998
Inventor
Eric John Diethorn
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.