Granted Patent
Utility
US 5,770,874 · App. 08/966,751
High density semiconductor memory device
Inventor:
Yuichi Egawa
Patented Case
View Patent ↗
Granted: Jun 23, 1998
Filed: Nov 10, 1997
Inventor
Yuichi Egawa
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.