Granted Patent
Utility
US 4,885,510 · App. 07/230,225
Beam current compensated vertical size control
Inventor:
Lloyd E. Matthews
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Aug 8, 1988
Inventor
Lloyd E. Matthews
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.