Granted Patent
Utility
US 5,535,158 · App. 08/350,978
Non-volatile semiconductor memory device and method for erasure and production thereof
Inventor:
Yasushi Yamagata
Patented Case
View Patent ↗
Granted: Jul 9, 1996
Filed: Nov 29, 1994
Inventor
Yasushi Yamagata
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.