Granted Patent
Utility
US 4,528,475 · App. 06/492,636
Color picture tube having spring supports for a mask-frame assembly
Inventor:
Frank R. Ragland, Jr.
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: May 9, 1983
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.