Granted Patent
Utility
US 4,002,941 · App. 04/763,996
Shadow mask cathode ray tube shield
Inventor:
Robert C. Demmy
Patented Case
View Patent ↗
Granted: Jan 11, 1977
Filed: Jul 1, 1968
Inventor
Robert C. Demmy
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.