Honeywell International, Inc. and Honeywell Intellectual Properties, Inc. (collectively, Honeywell) appeal from a final judgment of the U.S. Court of Federal Claims. The Court of Federal Claims held that the government infringed independent claim 2 of the patent-in-suit but that this claim is invalid. The Court of Federal Claims also held that Honeywell lacks standing on its claim for just compensation under the Invention Secrecy Act and that the first sale doctrine precludes Honeywell from recovering damages for one particular infringing system. For the reasons set forth below, we reverse and remand for a determination of damages.