Granted Patent
Utility
US 5,406,521 · App. 08/143,737
Semiconductor memory device and data erase method for it
Inventor:
Hideki Hara
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: Nov 1, 1993
Inventor
Hideki Hara
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.