Granted Patent
Utility
US 4,516,029 · App. 06/489,666
E beam stage with below-stage X-Y drive
Inventor:
Theodore W. Tucker
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Apr 28, 1983
Inventor
Theodore W. Tucker
Assignee (at issue)
Control Data Corporation
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.