Granted Patent
Utility
US 4,622,452 · App. 06/515,568
Electric arc vapor deposition electrode apparatus
Inventors:
Clark Bergman, Gary E. Vergason
Patented Case
View Patent ↗
Granted: Nov 11, 1986
Filed: Jul 21, 1983
Inventors
Clark Bergman
Gary E. Vergason
Assignee (at issue)
Multi-Arc Vacuum Systems, Inc.
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.