IP Library Granted Patent US 4,633,289
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,633,289
App. No.
06/531,546
Filed
1983-09-12
Granted
1986-12-30
Kind
A