Granted Patent
Utility
US 4,602,128 · App. 06/676,257
Automatic redialing arrangement for multi-line telephone station sets
Inventor:
Glen George Freundlich
Patented Case
View Patent ↗
Granted: Jul 22, 1986
Filed: Nov 29, 1984
Inventor
Glen George Freundlich
Assignee (at issue)
AT&T Information Systems 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.