Granted Patent
Utility
US 4,449,222 · App. 06/324,166
Digital modulation quality monitor
Inventors:
Joseph A. Crossett, III, Paul R. Hartmann
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Nov 23, 1981
Inventors
Joseph A. Crossett, III
Paul R. Hartmann
Assignee (at issue)
Rockwell International Corporation
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.