Fed. Circ. Upholds Judgments In Cygnus Patent MDL

Law360, New York (August 20, 2008, 12:00 AM EDT) -- The U.S. Court of Appeals for the Federal Circuit has upheld a lower court's ruling of invalidity in two cases involving AT&T Corp. and other communications providers in a dispute over patents for a computerized callback system.

Cygnus Telecommunications Technology Inc., the licensor of the callback patents, had appealed two final judgments handed down by the U.S. District Court for the District of Northern California that ruled that the patents-at-issue were invalid based on prior public use and commercial sales of the subject matter of the...
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