Granted Patent
Utility
US 6,541,797 · App. 09/204,280
Group-III nitride semiconductor light-emitting device
Inventor:
Takashi Udagawa
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Dec 3, 1998
Inventor
Takashi Udagawa
Assignee (at issue)
Showa Denko K.K.
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.