Granted Patent
Utility
US 5,629,640 · App. 08/587,787
Semiconductor memory device
Inventor:
Noboru Egawa
Patented Case
View Patent ↗
Granted: May 13, 1997
Filed: Dec 26, 1995
Inventor
Noboru Egawa
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.