Granted Patent
Utility
US 5,369,711 · App. 07/576,662
Automatic gain control for a headset
Inventor:
William A. Williamson
Patented Case
View Patent ↗
Granted: Nov 29, 1994
Filed: Aug 31, 1990
Inventor
William A. Williamson
Assignee (at issue)
BellSouth 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.