Granted Patent
Utility
US 4,422,916 · App. 06/347,699
Magnetron cathode sputtering apparatus
Inventor:
Harold E. McKelvey
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Feb 11, 1982
Inventor
Harold E. McKelvey
Assignee (at issue)
Shatterproof Glass Corp.
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.