Granted Patent
Utility
US 5,404,413 · App. 08/168,722
Optical circulator for dispersion compensation
Inventors:
Jean-Marc Pierre Delavaux, Kinichiro Ogawa
Patented Case
View Patent ↗
Granted: Apr 4, 1995
Filed: Dec 14, 1993
Inventors
Jean-Marc Pierre Delavaux
Kinichiro Ogawa
Assignee (at issue)
AT&T CORP.
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.