Granted Patent
Utility
US 4,602,287 · App. 06/554,154
Intermediate frequency filter with Nyquist phase modulation correction
Inventor:
Pieter Fockens
Patented Case
View Patent ↗
Granted: Jul 22, 1986
Filed: Nov 21, 1983
Inventor
Pieter Fockens
Assignee (at issue)
Zenith Electronics LLC
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.