Granted Patent
Utility
US 4,572,983 · App. 06/594,849
Color picture tube having an improved support structure for a color selection electrode
Inventor:
Frank R. Ragland, Jr.
Patented Case
View Patent ↗
Granted: Feb 25, 1986
Filed: Mar 29, 1984
Inventor
Frank R. Ragland, Jr.
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.