Granted Patent
Utility
US 5,006,715 · App. 07/352,440
Ion evaporation source for tin
Inventors:
Peter Back, Mark W. Utlaut, William M. Clark, Jr.
Patented Case
View Patent ↗
Granted: Apr 9, 1991
Filed: May 16, 1989
Inventors
Peter Back
Mark W. Utlaut
William M. Clark, Jr.
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.