Granted Patent
Utility
US 5,353,347 · App. 07/830,712
Telephone headset amplifier with battery saver, receive line noise reduction, and click-free mute switching
Inventors:
Pierre Irissou, Shu-Ren Chen, Dwight D. Lynn, Kirk A. Reid
Patented Case
View Patent ↗
Granted: Oct 4, 1994
Filed: Feb 4, 1992
Inventors
Pierre Irissou
Shu-Ren Chen
Dwight D. Lynn
Kirk A. Reid
Assignee (at issue)
ACS Communications, 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.