Granted Patent
Utility
US 4,747,140 · App. 06/946,042
Low distortion filters for separating frequency or phase modulated signals from composite signals
Inventor:
John Gibson
Patented Case
View Patent ↗
Granted: May 24, 1988
Filed: Dec 24, 1986
Inventor
John Gibson
Assignee (at issue)
RCA 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.