Granted Patent
Utility
US 5,226,053 · App. 07/815,307
Light emitting diode
Inventors:
Alfred Yi Cho, Erdmann F. Schubert, Li-Wei Tu, George J. Zydzik
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: Dec 27, 1991
Inventors
Alfred Yi Cho
Erdmann F. Schubert
Li-Wei Tu
George J. Zydzik
Assignee (at issue)
AT&T Bell Laboratories
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.