Granted Patent
Utility
US 4,638,210 · App. 06/720,470
Liquid metal ion source
Inventor:
Jerg B. Jergenson
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Apr 5, 1985
Inventor
Jerg B. Jergenson
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.