Granted Patent
Utility
US 4,406,970 · App. 06/282,229
Color picture tube having an expanded focus lens type inline electron gun with an improved stigmator
Inventor:
Richard H. Hughes
Patented Case
View Patent ↗
Granted: Sep 27, 1983
Filed: Jul 10, 1981
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.