Granted Patent
Utility
US 5,274,260 · App. 07/751,991
Semiconductor device
Inventor:
Atsuo Koshizuka
Patented Case
View Patent ↗
Granted: Dec 28, 1993
Filed: Aug 29, 1991
Inventor
Atsuo Koshizuka
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.