McAndrews, Held & Malloy, Ltd.
Upgradable modular wavelength division multiplexer
 A method and apparatus for constructing a modular and easily upgradable optical network node using the technique of wavelength-division multiplexing (WDM). According to the present invention, a WDM point-to-point link end node can be modularly upgraded in the number of wavelength channels or upgraded to a ring network node; both without requiring equipment internal rewiring. 
Tellabs Operations, Inc.
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Stuart Douglas Karen Paul Eliot Weyl-kuo
Brorson Liu Green, Jr. Wang