Granted Patent
Utility
US 4,912,327 · App. 07/364,202
Pulsed microfocused ion beams
Inventor:
Allen Robert Waugh
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Jun 9, 1989
Inventor
Allen Robert Waugh
Assignee (at issue)
VG Instruments Group Limited
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.