Granted Patent
Utility
US 6,574,049 · App. 10/145,547
Optical interleaver and de-interleaver
Inventors:
Charles Qian, Jianying Cao, Yi Qin
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: May 14, 2002
Inventors
Charles Qian
Jianying Cao
Yi Qin
Assignee (at issue)
Nexfon Corporation
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.