Granted Patent
Utility
US 5,689,441 · App. 08/409,235
Signal processing techniques based upon optical devices
Inventors:
Minakanagurki V. Ranganath, John F. Ribera
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: Mar 24, 1995
Inventors
Minakanagurki V. Ranganath
John F. Ribera
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.