Granted Patent
Utility
US 6,144,585 · App. 08/890,600
Semiconductor storage device for storing three-or multi-valued data in one memory cell
Inventor:
Katsuki Hazama
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Jul 9, 1997
Inventor
Katsuki Hazama
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.