Granted Patent
Utility
US 6,529,673 · App. 09/773,854
Manual variable optical attenuator and method
Inventors:
Yongsheng Liu, Vincent Nguyen
Patented Case
View Patent ↗
Granted: Mar 4, 2003
Filed: Jan 31, 2001
Inventors
Yongsheng Liu
Vincent Nguyen
Assignee (at issue)
Avanex 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.