Granted Patent
Utility
US 4,754,484 · App. 06/898,951
Convertible handset/headset for telephone
Inventors:
Wallace Keith Larkin, Toni R. Stevens
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Aug 21, 1986
Inventors
Wallace Keith Larkin
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.