Granted Patent
Utility
US 4,989,061 · App. 06/904,271
Radiation hard memory cell structure with drain shielding
Inventors:
Roger G. Stewart, Dora Plus
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: Sep 5, 1986
Inventors
Roger G. Stewart
Dora Plus
Assignee (at issue)
General Electric Company
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.