Granted Patent
Utility
US 5,825,754 · App. 08/580,176
Filter and process for reducing noise in audio signals
Inventor:
Errol R. Williams
Patented Case
View Patent ↗
Granted: Oct 20, 1998
Filed: Dec 28, 1995
Inventor
Errol R. Williams
Assignee (at issue)
VTEL 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.