Granted Patent
Utility
US 4,600,859 · App. 06/601,779
Cathode ray tube protection systems
Inventor:
Gregory J. Beaumont
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Apr 19, 1984
Inventor
Gregory J. Beaumont
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.