Granted Patent
Utility
US 5,657,272 · App. 08/617,289
Non-volatile semiconductor memory and data erasing method for the same
Inventor:
Toshiya Sato
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: Mar 18, 1996
Inventor
Toshiya Sato
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.