Granted Patent
Utility
US 4,251,833 · App. 06/037,517
Television horizontal AFPC with phase detector driven at twice the horizontal frequency
Inventors:
Ronald E. Fernsler, Donald H. Willis
Patented Case
View Patent ↗
Granted: Feb 17, 1981
Filed: May 9, 1979
Inventors
Ronald E. Fernsler
Donald H. Willis
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.