Granted Patent
Utility
US 4,593,224 · App. 06/538,001
Tension mask cathode ray tube
Inventor:
Kazimir Palac
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: Sep 30, 1983
Inventor
Kazimir Palac
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.