Granted Patent
Utility
US 4,694,450 · App. 06/616,017
Method and apparatus for adaptive receiver squelch echo control
Inventor:
Hans P. Staab
Patented Case
View Patent ↗
Granted: Sep 15, 1987
Filed: May 31, 1984
Inventor
Hans P. Staab
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.