Granted Patent
Utility
US 5,639,679 · App. 08/509,631
Method of manufacturing a semiconductor device comprising a non-volatile memory cell having a multi-layered floating gate
Inventor:
Satoru Muramatu
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: Jul 31, 1995
Inventor
Satoru Muramatu
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.