Granted Patent
Utility
US 6,285,499 · App. 09/432,382
Compact polarization insensitive circulators with simplified structure and low polarization mode dispersion
Inventors:
Ping Xie, Yonglin Huang
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Oct 29, 1999
Inventors
Ping Xie
Yonglin Huang
Assignee (at issue)
New Focus, 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.