Granted Patent
Utility
US 6,163,610 · App. 09/055,481
Telephonic handset apparatus having an earpiece monitor and reduced inter-user variability
Inventors:
Charles S. Bartlett, Michael A. Zuniga
Patented Case
View Patent ↗
Granted: Dec 19, 2000
Filed: Apr 6, 1998
Inventors
Charles S. Bartlett
Michael A. Zuniga
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.