Zeppelin Corporation filed each of the previous cases in its sole litigation campaign—against ASUSTek, OnePlus, Verizon, Xiaomi, and ZTE—in the Eastern District of Texas, which only requires litigants to file a basic corporate disclosure. In its sixth complaint, Zeppelin accuses Huawei (3:23-cv-01233) of infringing the same patent, which is generally related to a smartphone with a display that includes a particular layer of fluorescent material. Zeppelin filed that sixth case in the Northern District of Texas, which imposes heightened disclosure requirements on litigants. There, unlike in the Eastern District of Texas, plaintiffs must file a separately signed certificate of interested parties that contains “a complete list of all persons, associations of persons, firms, partnerships, corporations, guarantors, insurers, affiliates, parent or subsidiary corporations, or other legal entities that are financially interested in the outcome of the case”.