Granted Patent
Utility
US 4,954,787 · App. 07/354,517
Audio signal transmission system with noise suppression network
Inventor:
Bruce A. Brisson
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: May 18, 1989
Inventor
Bruce A. Brisson
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.