Granted Patent
Utility
US 4,710,477 · App. 06/898,180
Method for forming latch-up immune, multiple retrograde well high density CMOS FET
Inventor:
John Chen
Patented Case
View Patent ↗
Granted: Dec 1, 1987
Filed: Aug 20, 1986
Inventor
John Chen
Assignee (at issue)
Hughes Aircraft 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.