Granted Patent
Utility
US 4,719,497 · App. 06/868,161
High efficiency light-emitting diode
Inventor:
Ming-Jong Tsai
Patented Case
View Patent ↗
Granted: Jan 12, 1988
Filed: May 27, 1986
Inventor
Ming-Jong Tsai
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.