Granted Patent
Utility
US 5,221,839 · App. 07/656,884
Double bevel gradient-index rod lens optical receiver having high optical return loss
Inventor:
David M. Braun
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Feb 15, 1991
Inventor
David M. Braun
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.