Granted Patent
Utility
US 4,864,610 · App. 07/019,748
Earpiece for a telephone headset
Inventor:
Toni R. Stevens
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Feb 27, 1987
Inventor
Toni R. Stevens
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.