Granted Patent
Utility
US 5,073,004 · App. 07/525,417
Tunable optical filter
Inventors:
Jane B. Clayton, Muhammad A. El, Lucius J. Freeman, Calvin M. Miller
Patented Case
View Patent ↗
Granted: Dec 17, 1991
Filed: May 18, 1990
Inventors
Jane B. Clayton
Muhammad A. El
Lucius J. Freeman
Calvin M. Miller
Assignee (at issue)
AT&T Bell Laboratories
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.