Granted Patent
Utility
US 5,216,702 · App. 07/842,675
Nonintrusive speech level and dynamic noise measurements
Inventor:
David Ramsden
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Feb 27, 1992
Inventor
David Ramsden
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.