Granted Patent
Utility
US 5,537,005 · App. 08/242,569
High-current, low-pressure plasma-cathode electron gun
Inventors:
Dan M. Goebel, Robert W. Schumacher
Patented Case
View Patent ↗
Granted: Jul 16, 1996
Filed: May 13, 1994
Inventors
Dan M. Goebel
Robert W. Schumacher
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.