Granted Patent
Utility
US 4,864,371 · App. 07/122,150
Partially opaque substrate red LED
Inventor:
Frank M. Steranka
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Nov 18, 1987
Inventor
Frank M. Steranka
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.