Granted Patent
Utility
US 5,072,439 · App. 07/494,640
High speed opto-electronic crossbar switch
Inventors:
Stephen R. Forrest, Gregory L. Tangonan
Patented Case
View Patent ↗
Granted: Dec 10, 1991
Filed: Mar 16, 1990
Inventors
Stephen R. Forrest
Gregory L. Tangonan
Assignee (at issue)
Hughes Aircraft Company
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.