Granted Patent
Utility
US 4,293,791 · App. 06/094,464
Color picture tube having improved corrugated apertured mask
Inventor:
Ralph J. D'Amato
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Nov 15, 1979
Inventor
Ralph J. D'Amato
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.