Granted Patent
Utility
US 5,699,418 · App. 08/620,414
Telephone circuit
Inventor:
David R. Jones
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Mar 22, 1996
Inventor
David R. Jones
Assignee (at issue)
Nortel Networks Limited
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.