Granted Patent
Utility
US 4,429,252 · App. 06/348,023
Color picture tube having an expanded focus lens type inline electron gun with improved static convergence
Inventors:
Leon J. Vieland, Roger C. Alig
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Feb 11, 1982
Inventors
Leon J. Vieland
Roger C. Alig
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.