Granted Patent
Utility
US 6,602,390 · App. 08/927,864
Coating a workpiece and operating a cathodic arc discharge
Inventors:
Hans Brändle, Erich Bergmann
Patented Case
View Patent ↗
Granted: Aug 5, 2003
Filed: Sep 11, 1997
Inventors
Hans Brändle
Erich Bergmann
Assignee (at issue)
Unaxis Balzers Aktiengesellschaft
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.