Granted Patent
Utility
US 6,434,318 · App. 09/630,981
Device and method for variable attenuation of an optical channel
Inventors:
William K. Bischel, Tony C. Kowalczyk
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Aug 2, 2000
Inventors
William K. Bischel
Tony C. Kowalczyk
Assignee (at issue)
GEMFIRE 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.