Granted Patent
Utility
US 4,253,041 · App. 06/067,487
Extended field electron gun having a synthesized axial potential
Inventors:
Allen P. Blacker, Arthur J. Ingle
Patented Case
View Patent ↗
Granted: Feb 24, 1981
Filed: Aug 16, 1979
Inventors
Allen P. Blacker
Arthur J. Ingle
Assignee (at issue)
Zenith Radio 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.