Granted Patent
Utility
US 4,556,821 · App. 06/590,036
Color image display system having an improved external magnetic shield
Inventor:
John C. Cooper
Patented Case
View Patent ↗
Granted: Dec 3, 1985
Filed: Mar 15, 1984
Inventor
John C. Cooper
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.