Granted Patent
Utility
US 4,131,822 · App. 05/799,078
Cathode ray tube with stress-relieved slot-aperture shadow mask
Inventor:
Tom W. Branton
Patented Case
View Patent ↗
Granted: Dec 26, 1978
Filed: May 20, 1977
Inventor
Tom W. Branton
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.