Granted Patent
Utility
US 4,810,346 · App. 07/111,207
Magnetron type sputtering cathode
Inventors:
Bernd Wolf, Peter Wirz
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Oct 21, 1987
Inventors
Bernd Wolf
Peter Wirz
Assignee (at issue)
Leybold GmbH
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.