Granted Patent
Utility
US 5,902,649 · App. 08/985,055
Vacuum treatment system for homogeneous workpiece processing
Inventors:
Johann Karner, Mauro Pedrazzini, Erich Bergmann
Patented Case
View Patent ↗
Granted: May 11, 1999
Filed: Dec 4, 1997
Inventors
Johann Karner
Mauro Pedrazzini
Erich Bergmann
Assignee (at issue)
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.