Granted Patent
Utility
US 4,583,022 · App. 06/615,589
Color picture tube having shadow mask with specific curvature and column aperture spacing
Inventor:
Walter D. Masterton
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: May 31, 1984
Inventor
Walter D. Masterton
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.