Granted Patent
Utility
US 5,586,191 · App. 08/226,139
Adjustable filter for differential microphones
Inventors:
Gary W. Elko, Robert A. Kubli, Dennis R. Morgan, James E. West
Patented Case
View Patent ↗
Granted: Dec 17, 1996
Filed: Apr 11, 1994
Inventors
Gary W. Elko
Robert A. Kubli
Dennis R. Morgan
James E. West
Assignee (at issue)
LUCENT TECHNOLOGIES INC.
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.