Granted Patent
Utility
US 4,965,775 · App. 07/354,535
Image derived directional microphones
Inventors:
Gary W. Elko, Robert A. Kubli, Jeffrey Phillip McAteer, James E. West
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: May 19, 1989
Inventors
Gary W. Elko
Robert A. Kubli
Jeffrey Phillip McAteer
James E. West
Assignee (at issue)
AT&T Bell Laboratories
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.