Granted Patent
Utility
US 5,163,712 · App. 07/783,309
Rotatable vacuum flange
Inventors:
David Sabo, Steven P. Young
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: Oct 28, 1991
Inventors
David Sabo
Steven P. Young
Assignee (at issue)
Varian, 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.