Granted Patent
Utility
US 6,556,765 · App. 09/835,339
Planar variable optical attenuator
Inventors:
Brian L. Heffner, Gokul Krishnan
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Apr 17, 2001
Inventors
Brian L. Heffner
Gokul Krishnan
Assignee (at issue)
E-Tek Dynamics, 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.