Granted Patent
Utility
US 4,633,143 · App. 06/499,573
Convergence correction apparatus for delta-gun color cathode ray tube displays
Inventor:
Richard I. McCartney
Patented Case
View Patent ↗
Granted: Dec 30, 1986
Filed: May 31, 1983
Inventor
Richard I. McCartney
Assignee (at issue)
Sperry Corp.
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.