Granted Patent
Utility
US 5,579,431 · App. 07/956,614
Speech detection in presence of noise by determining variance over time of frequency band limited energy
Inventor:
Benjamin Reaves
Patented Case
View Patent ↗
Granted: Nov 26, 1996
Filed: Oct 5, 1992
Inventor
Benjamin Reaves
Assignees (at issue)
Panasonic Technologies, Inc.
SUMITOMO ELECTRIC INDUSTRIES, LTD.
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.