Granted Patent
Utility
US 5,485,515 · App. 08/175,095
Background noise compensation in a telephone network
Inventors:
Jonathan B. Allen, Donald Joseph Youtkus
Patented Case
View Patent ↗
Granted: Jan 16, 1996
Filed: Dec 29, 1993
Inventors
Jonathan B. Allen
Donald Joseph Youtkus
Assignee (at issue)
AT&T CORP.
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.