Granted Patent
Utility
US 4,591,755 · App. 06/380,792
Cathode-ray tube with magnetic ring
Inventor:
Walter Kornaker
Patented Case
View Patent ↗
Granted: May 27, 1986
Filed: May 21, 1982
Inventor
Walter Kornaker
Assignee (at issue)
ITT Industries
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.