Granted Patent
Utility
US 6,469,835 · App. 09/704,113
Optical collimator with long working distance
Inventor:
Zhimin Liu
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Oct 30, 2000
Inventor
Zhimin Liu
Assignee (at issue)
Oplink Communications, LLC
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.