Granted Patent
Utility
US 4,707,637 · App. 06/842,960
Plasma-anode electron gun
Inventor:
Robin J. Harvey
Patented Case
View Patent ↗
Granted: Nov 17, 1987
Filed: Mar 24, 1986
Inventor
Robin J. Harvey
Assignee (at issue)
Hughes Aircraft Company
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.