Granted Patent
Utility
US 4,633,289 · App. 06/531,546
Latch-up immune, multiple retrograde well high density CMOS FET
Inventor:
John Yuan-Tai Chen
Patented Case
View Patent ↗
Granted: Dec 30, 1986
Filed: Sep 12, 1983
Inventor
John Yuan-Tai 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.