Granted Patent
Utility
US 5,123,009 · App. 07/604,695
Method and apparatus for disabling an echo canceller
Inventor:
Stephen J. Winter
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: Oct 26, 1990
Inventor
Stephen J. Winter
Assignee (at issue)
Racal Data Communications, 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.