Estech Systems IP, LLC v. Mitel Networks, Inc., No. 2:21-cv-00473 (E.D. Tex. Jan. 17, 2023)

From the Opinion

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Before the Court, plaintiff Estech Systems IP, LLC moves for leave to serve its first supplemental infringement contentions on defendant s Fiserv, Inc. and Fiserv Solution, LLC (“Fiserv”). Dkt. No. 225. The motion is fully briefed. Dkt. Nos. 237 (response), 250 (reply), and 272 (sur-reply). I. Background On December 3 1, 2021, Estech filed suit against Fiserv alleging patent infringement of U.S. patents generally directed to voice over internet protocol (“VoIP”) telephone systems . Dkt. No. 1.