Granted Patent
Utility
US 4,192,253 · App. 05/962,835
Vacuum coating apparatus
Inventors:
Hans Aichert, Friedrich Stark, Herbert Stephan, Otto-Horst Hoffmann
Patented Case
View Patent ↗
Granted: Mar 11, 1980
Filed: Nov 21, 1978
Inventors
Hans Aichert
Friedrich Stark
Herbert Stephan
Otto-Horst Hoffmann
Assignee (at issue)
Leybold-Hereaus 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.