Granted Patent
Utility
US 4,471,493 · App. 06/450,496
Wireless telephone extension unit with self-contained dipole antenna
Inventor:
Edward A. Schober
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Dec 16, 1982
Inventor
Edward A. Schober
Assignee (at issue)
GTE Automatic Electric Incorporated
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.