Granted Patent
Utility
US 4,393,577 · App. 06/329,759
Semiconductor devices and method of manufacturing the same
Inventor:
Kazuo Imai
Patented Case
View Patent ↗
Granted: Jul 19, 1983
Filed: Dec 11, 1981
Inventor
Kazuo Imai
Assignee (at issue)
Nippon Telegraph and Telephone Public Corporation
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.