Granted Patent
Utility
US 6,822,793 · App. 09/944,593
Compact polarization insensitive circulators with simplified structure and low polarization mode dispersion
Inventors:
Ping Xie, Yonglin Huang
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Aug 31, 2001
Inventors
Ping Xie
Yonglin Huang
Assignee (at issue)
FINISAR 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.