Granted Patent
Utility
US 5,250,828 · App. 07/863,039
Structure of semiconductor memory device
Inventor:
Toshihiro Honma
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: Apr 3, 1992
Inventor
Toshihiro Honma
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.