Granted Patent
Utility
US 4,528,476 · App. 06/545,049
Cathode-ray tube having electron gun with three focus lenses
Inventor:
Roger T. Alig
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: Oct 24, 1983
Inventor
Roger T. Alig
Assignee (at issue)
RCA 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.