Granted Patent
Utility
US 5,250,470 · App. 07/826,689
Method for manufacturing a semiconductor device with corrosion resistant leads
Inventor:
Tadashi Yamaguchi
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: Jan 29, 1992
Inventor
Tadashi Yamaguchi
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.