Granted Patent
Utility
US 4,750,857 · App. 06/859,586
Wafer cassette transfer mechanism
Inventor:
Peter Kochersperger
Patented Case
View Patent ↗
Granted: Jun 14, 1988
Filed: May 5, 1986
Inventor
Peter Kochersperger
Assignee (at issue)
PerkinElmer, 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.