PROST, Circuit Judge.
This patent infringement case involves a combination ophthalmic drug treatment. The issues on appeal are invalidity and claim construction. Sandoz Inc., Alcon Laboratories, Inc., Alcon Research Ltd., Alcon, Inc., and Falcon Pharmaceuticals, Ltd. (collectively, "Sandoz") challenge the district court's finding that the claims of U.S. Patent Nos. 7,642,258 ("'258 patent"); 7,320,976 ("'976 patent"); 7,323,463 ("'463 patent"); and 7,030,149 ("'149...
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