Granted Patent
Utility
US 6,265,237 · App. 09/461,947
In-wafer testing of DFB semiconductor lasers
Inventors:
William R. Heffner, John Evan Johnson
Patented Case
View Patent ↗
Granted: Jul 24, 2001
Filed: Dec 15, 1999
Inventors
William R. Heffner
John Evan Johnson
Assignee (at issue)
LUCENT TECHNOLOGIES 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.