Granted Patent
Utility
US 4,558,388 · App. 06/548,124
Substrate and substrate holder
Inventor:
Walter E. Graves
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Nov 2, 1983
Inventor
Walter E. Graves
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.