Granted Patent
Utility
US 5,451,269 · App. 08/288,355
Semiconductor memory device including an improved substrate structure and method of fabricating the same
Inventor:
Kuniaki Koyama
Patented Case
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Granted: Sep 19, 1995
Filed: Aug 10, 1994
Inventor
Kuniaki Koyama
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.