Granted Patent
Utility
US 4,802,227 · App. 07/034,816
Noise reduction processing arrangement for microphone arrays
Inventors:
Gary W. Elko, Man M. Sondhi, James E. West
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Apr 3, 1987
Inventors
Gary W. Elko
Man M. Sondhi
James E. West
Assignees (at issue)
American Telephone and Telegraph, Co.
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.