Granted Patent
Utility
US 6,180,463 · App. 09/182,013
Method for fabricating a multi-level mask ROM
Inventor:
Kazutaka Otsuki
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Oct 29, 1998
Inventor
Kazutaka Otsuki
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.