Granted Patent
Utility
US 6,560,396 · App. 09/606,550
Variable optical attenuator
Inventors:
Mei Yan, Hongchuan Wang
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Jun 29, 2000
Inventors
Mei Yan
Hongchuan Wang
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.