Granted Patent
Utility
US 4,633,459 · App. 06/680,207
Repeater for carrier subscriber communication system
Inventor:
Tom L. Blackburn
Patented Case
View Patent ↗
Granted: Dec 30, 1986
Filed: Dec 10, 1984
Inventor
Tom L. Blackburn
Assignee (at issue)
GTE Communication Systems Corporation
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.