Granted Patent
Utility
US 5,623,539 · App. 08/189,003
Using voice signal analysis to identify authorized users of a telephone system
Inventors:
Charles S. Bassenyemukasa, Randolph John Pilc
Patented Case
View Patent ↗
Granted: Apr 22, 1997
Filed: Jan 27, 1994
Inventors
Charles S. Bassenyemukasa
Randolph John Pilc
Assignee (at issue)
LUCENT TECHNOLOGIES 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.