Granted Patent
Utility
US 4,800,318 · App. 07/013,676
Electrode assembly for electrostatic lens of electron gun
Inventor:
Kazuaki Naiki
Patented Case
View Patent ↗
Granted: Jan 24, 1989
Filed: Feb 12, 1987
Inventor
Kazuaki Naiki
Assignee (at issue)
NEC 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.