Granted Patent
Utility
US 4,847,211 · App. 07/045,802
Method of manufacturing semiconductor devices and product therefrom
Inventor:
Michael Lee
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Apr 27, 1987
Inventor
Michael Lee
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.