Granted Patent
Utility
US 6,597,833 · App. 09/967,850
Wavelength-division multiplexers and demultiplexers based on mach-zehnder interferometers and evanescent coupling
Inventors:
Bo Pi, Shulai Zhao
Patented Case
View Patent ↗
Granted: Jul 22, 2003
Filed: Sep 26, 2001
Inventors
Bo Pi
Shulai Zhao
Assignee (at issue)
Oluma, Inc.
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.