Granted Patent
Utility
US 5,649,019 · App. 08/432,094
Digital apparatus for reducing acoustic feedback
Inventor:
Samuel L. Thomasson
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: May 1, 1995
Inventor
Samuel L. Thomasson
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.