Granted Patent
Utility
US 6,204,561 · App. 08/745,274
Semiconductor device having two-layer contact
Inventor:
Shunichi Yoshizawa
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Nov 8, 1996
Inventor
Shunichi Yoshizawa
Assignee (at issue)
NIPPON STEEL 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.