Granted Patent
Utility
US 4,317,065 · App. 06/125,648
Color picture tube having an improved electron gun with expanded lenses
Inventor:
Richard H. Hughes
Patented Case
View Patent ↗
Granted: Feb 23, 1982
Filed: Feb 28, 1980
Inventor
Richard H. Hughes
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.