Granted Patent
Utility
US 5,872,728 · App. 08/831,271
Process for computing the coefficients of an adaptive filter in an echo-cancellor
Inventor:
Gerard Richter
Patented Case
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Granted: Feb 16, 1999
Filed: Mar 31, 1997
Inventor
Gerard Richter
Assignee (at issue)
International Business Machines Corporation
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.