Plaintiff Labyrinth Optical Technologies LLC ("Labyrinth") filed a patent infringement action against Defendant Alcatel-Lucent USA, Inc. ("Lucent"), alleging that Lucent infringes U.S. Patent No. 8,103,173 (the "'173 Patent"). On the eve of trial, Lucent filed a motion to dismiss the case for lack of standing, arguing that Labyrinth could not show that it holds the rights to the '173 Patent.
The district court review the following facts to analyze the motion: "In November 2011, Teradvance Communications, LLC ("Teradvance") granted to Acacia Research Group LLC ("Acacia") an exclusive licence to certain patents and patent applications listed in an attached exhibit ("Exclusive License"). The list included foreign and domestic patents and pending patent applications, including U.S. Patent Application No. 12/554,241, which later issued as the '173 Patent. In April 2012, Acacia entered into an Assignment and Assumption Agreement ("Assignment") with Labyrinth, one of Acacia's affiliates. By its express terms, the Assignment is governed by Texas law. The Assignment notes that the Exclusive License covered "the Patents listed in the Exhibit attached hereto (the 'Patents')," but the Assignment does not specify whether the Exclusive License covered anything else. The Assignment states that it conveyed rights to the "Patents." But unlike the Exclusive License, which actually has an exhibit identifying the patents subject to the agreement, the Assignment does not."