Granted Patent
Utility
US 6,653,663 · App. 09/729,424
Nitride semiconductor device
Inventor:
Masahiro Ishida
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Dec 5, 2000
Inventor
Masahiro Ishida
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.