Granted Patent
Utility
US 5,696,821 · App. 08/607,909
Radiotelephone and method therefor for substantially reducing audio feedback
Inventor:
Steven Adam Urbanski
Patented Case
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Granted: Dec 9, 1997
Filed: Feb 28, 1996
Inventor
Steven Adam Urbanski
Assignee (at issue)
Motorola, Inc.
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.