Granted Patent
Utility
US 4,771,216 · App. 07/085,901
Electron gun system providing for control of convergence, astigmatism and focus with a single dynamic signal
Inventors:
Allen P. Blacker, Khem Garewal
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Aug 13, 1987
Inventors
Allen P. Blacker
Khem Garewal
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.