Granted Patent
Utility
US 4,599,533 · App. 06/610,483
Color picture tube having shadow mask frame with truncated corners
Inventor:
Frank R. Ragland, Jr.
Patented Case
View Patent ↗
Granted: Jul 8, 1986
Filed: May 15, 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.