Granted Patent
Utility
US 4,685,130 · App. 06/770,466
Subscriber line circuit having an improved loop current supply circuit
Inventor:
Robert V. Burns
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: Aug 29, 1985
Inventor
Robert V. Burns
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.