Granted Patent
Utility
US 4,634,923 · App. 06/094,557
Color picture tube having improved electron gun
Inventor:
Roger C. Alig
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Nov 15, 1979
Inventor
Roger C. 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.