Granted Patent
Utility
US 6,153,894 · App. 09/438,788
Group-III nitride semiconductor light-emitting device
Inventor:
Takashi Udagawa
Patented Case
View Patent ↗
Granted: Nov 28, 2000
Filed: Nov 12, 1999
Inventor
Takashi Udagawa
Assignee (at issue)
SHOWA DENKO
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.