Granted Patent
Utility
US 5,208,179 · App. 07/634,441
Method of fabricating programmable read only memory device having trench isolation structure
Inventor:
Takeshi Okazawa
Patented Case
View Patent ↗
Granted: May 4, 1993
Filed: Dec 27, 1990
Inventor
Takeshi Okazawa
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.