Granted Patent
Utility
US 4,974,207 · App. 07/317,252
Semiconductor memory device
Inventor:
Kiyokazu Hashimoto
Patented Case
View Patent ↗
Granted: Nov 27, 1990
Filed: Feb 28, 1989
Inventor
Kiyokazu Hashimoto
Assignee (at issue)
NEC 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.