After suing AT&T (AT&T Mobility), Deutsche Telekom (Sprint, T-Mobile), and Verizon (Verizon Wireless), as well as Lenovo (Motorola Mobility), Headwater Research LLC has returned to the first defendant in this campaign, hitting Samsung (2:23-cv-00641) with another complaint in the Eastern District of Texas. Four more mobile data management patents join the 14 from the same large family already in suit against Samsung, which just filed an amended answer in the first case in this campaign, pleading additional facts in support of its marking defense as well as adding three new affirmative defenses: inequitable conduct and “infectious unenforceability”; lack of standing; and prosecution laches.