Granted Patent
Utility
US 5,886,367 · App. 08/906,935
Epitaxial wafer device including an active layer having a two-phase structure and light-emitting device using the wafer
Inventor:
Takashi Udagawa
Patented Case
View Patent ↗
Granted: Mar 23, 1999
Filed: Aug 6, 1997
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.