Granted Patent
Utility
US 5,874,766 · App. 08/427,633
Semiconductor device having an oxynitride film
Inventor:
Takashi Hori
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Apr 21, 1995
Inventor
Takashi Hori
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, LTD.
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.