Granted Patent
Utility
US 4,086,513 · App. 05/554,610
Plural gun cathode ray tube having parallel plates adjacent grid apertures
Inventor:
John Evans
Patented Case
View Patent ↗
Granted: Apr 25, 1978
Filed: Mar 3, 1975
Inventor
John Evans
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.