Granted Patent
Utility
US 4,513,855 · App. 06/447,347
Substrate elevator mechanisms
Inventors:
Ivan M. Fletcher, Gary W. Gladish
Patented Case
View Patent ↗
Granted: Apr 30, 1985
Filed: Dec 6, 1982
Inventors
Ivan M. Fletcher
Gary W. Gladish
Assignee (at issue)
AT&T Technologies Incorporated
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.