Granted Patent
Utility
US 6,134,224 · App. 08/837,722
Automatic echo cancellation for an integrated services digital network interface
Inventors:
Charles Reese, Barry Bielsker
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Apr 22, 1997
Inventors
Charles Reese
Barry Bielsker
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.