Granted Patent
Utility
US 5,121,071 · App. 07/738,468
Lock detector for unbalanced QPSK demodulators
Inventors:
Lawrence R. Kelly, Geoffrey S. Waugh
Patented Case
View Patent ↗
Granted: Jun 9, 1992
Filed: Jul 31, 1991
Inventors
Lawrence R. Kelly
Geoffrey S. Waugh
Assignee (at issue)
Loral Aerospace Corp.
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.