Granted Patent
Utility
US 5,293,421 · App. 07/632,963
Summing amplifier with a complex weighting factor and interface including such a summing amplifier
Inventor:
Hans-Jurgen Zanzig
Patented Case
View Patent ↗
Granted: Mar 8, 1994
Filed: Dec 20, 1990
Inventor
Hans-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.