Granted Patent
Utility
US 5,194,404 · App. 07/671,525
Method of manufacturing a contact structure for a semiconductor device
Inventor:
Yoshiki Nagatomo
Patented Case
View Patent ↗
Granted: Mar 16, 1993
Filed: Mar 19, 1991
Inventor
Yoshiki Nagatomo
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., LTD.
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.