Granted Patent
Utility
US 4,556,798 · App. 06/512,879
Focused ion beam column
Inventors:
Charles M. McKenna, William M. Clark, Jr., Robert L. Seliger
Patented Case
View Patent ↗
Granted: Dec 3, 1985
Filed: Jul 12, 1983
Inventors
Charles M. McKenna
William M. Clark, Jr.
Robert L. Seliger
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.