MARKEY, Chief Judge.
Roper Corporation (Roper) appeals from a judgment of the United States District Court for the District of Massachusetts declaring U.S. Patent No. 4,028,520 ('520 patent), issued to Sumner H. Torrey and assigned to Roper, invalid for lack of utility and because its disclosure is non-enabling. Raytheon Company (Raytheon) cross-appeals a holding of nonobviousness, a finding of infringement, and a refusal to award attorney fees. We reverse in part...
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