Granted Patent
Utility
US 5,258,713 · App. 07/868,940
Impedance generator for a telephone line interface circuit
Inventors:
Reinhard W. Rosch, Graeme B. Boyd, Mark Feeley
Patented Case
View Patent ↗
Granted: Nov 2, 1993
Filed: Apr 16, 1992
Inventors
Reinhard W. Rosch
Graeme B. Boyd
Mark Feeley
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.