Granted Patent
Utility
US 4,645,883 · App. 06/608,628
Double talk and line noise detector for a echo canceller
Inventors:
Otakar A. Horna, Edwin A. Stennett, Ferial T. El-Mokadem
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: May 9, 1984
Inventors
Otakar A. Horna
Edwin A. Stennett
Ferial T. El-Mokadem
Assignee (at issue)
Communications Satellite 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.