Granted Patent
Utility
US 4,625,144 · App. 06/492,068
Color-picture tube with correction magnets in electron gun system for twist correction
Inventor:
Walter Kornaker
Patented Case
View Patent ↗
Granted: Nov 25, 1986
Filed: May 6, 1983
Inventor
Walter Kornaker
Assignee (at issue)
International Standard Electric 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.