Granted Patent
Utility
US 6,149,783 · App. 09/314,833
Vacuum treatment apparatus
Inventors:
Hans Signer, Eduard Kugler, Klaus Wellerdieck, Helmut Rudigier, Walter Haag
Patented Case
View Patent ↗
Granted: Nov 21, 2000
Filed: May 19, 1999
Inventors
Hans Signer
Eduard Kugler
Klaus Wellerdieck
Helmut Rudigier
Walter Haag
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.