Granted Patent
Utility
US 4,468,539 · App. 06/450,406
Wireless telephone system with intercom signalling and auxiliary station
Inventor:
Edward A. Schober
Patented Case
View Patent ↗
Granted: Aug 28, 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.