Granted Patent
Utility
US 4,190,467 · App. 05/970,031
Semiconductor device production
Inventor:
Suei-Yuen P. Lien
Patented Case
View Patent ↗
Granted: Feb 26, 1980
Filed: Dec 15, 1978
Inventor
Suei-Yuen P. Lien
Assignee (at issue)
Western Electric Company, Inc.
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.