Granted Patent
Utility
US 6,014,244 · App. 09/100,666
Multi-port optical circulator utilizing imaging lens and correction optical element
Inventor:
Kok-Wai Chang
Patented Case
View Patent ↗
Granted: Jan 11, 2000
Filed: Jun 18, 1998
Inventor
Kok-Wai Chang
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.