Granted Patent
Utility
US 6,434,235 · App. 09/630,170
Acoustic echo canceler
Inventor:
John Minkoff
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Aug 1, 2000
Inventor
John Minkoff
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.