Granted Patent
Utility
US 4,789,999 · App. 06/760,199
Line circuit for coupling a subscriber set to a switching facility to provide a complex impedance match
Inventors:
Peter Meschkat, Jurgen Zanzig
Patented Case
View Patent ↗
Granted: Dec 6, 1988
Filed: Jul 29, 1985
Inventors
Peter Meschkat
Jurgen Zanzig
Assignee (at issue)
Alcatel N.V.
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.