Granted Patent
Utility
US 4,886,969 · App. 07/285,830
Cluster beam apparatus utilizing cold cathode cluster ionizer
Inventor:
Wolfgang Knauer
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Dec 16, 1988
Inventor
Wolfgang Knauer
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.