Granted Patent
Utility
US 6,452,945 · App. 09/229,594
Electrical add-drop multiplexing for optical communications networks utilizing frequency division multiplexing
Inventors:
David B. Upham, Augustus Elmer, Laurence J. Newell, David Pechner, Abraham H. Kou, Michael W. Rowan, James F. Coward, Norman L. Swenson, Minnie Ho
Patented Case
View Patent ↗
Granted: Sep 17, 2002
Filed: Jan 13, 1999
Inventors
David B. Upham
Augustus Elmer
Laurence J. Newell
David Pechner
Abraham H. Kou
Michael W. Rowan
James F. Coward
Norman L. Swenson
Minnie Ho
Assignee (at issue)
Kestrel Solutions, 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.