Granted Patent
Utility
US 5,943,149 · App. 09/025,468
Optical multiplexor/demultiplexor using a narrow band filter followed by a wideband filter
Inventors:
Kevin J. Cearns, Calvin Si
Patented Case
View Patent ↗
Granted: Aug 24, 1999
Filed: Feb 18, 1998
Inventors
Kevin J. Cearns
Calvin Si
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.