Granted Patent
Utility
US 6,191,978 · App. 09/553,880
Non-volatile semiconductor memory device
Inventors:
Kazuo Watanabe, Masaki Uekubo
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Apr 20, 2000
Inventors
Kazuo Watanabe
Masaki Uekubo
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.