Granted Patent
Utility
US 4,422,014 · App. 06/320,325
Method and apparatus for obtaining a focusable beam of electrons from a gaseous hollow-cathode discharge
Inventor:
David M. Glaser
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Nov 12, 1981
Inventor
David M. Glaser
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.