This past August, Texas plaintiff Cobblestone Wireless, LLC filed a second trio of suits against AT&T (AT&T Mobility), Deutsche Telekom (T-Mobile), and Verizon (Verizon Wireless). In the first set of complaints, filed in December 2022, Cobblestone asserted four former Empire Technology Development LLC patents, but in April of this year, the plaintiff picked up a batch of patents from a new source, circling back to assert one of those patents against each of the three wireless carriers. Now, Cobblestone has accused Cisco (2:23-cv-00454), HP Enterprise (HPE) (Aruba Networks) (2:23-cv-00457), and CommScope (ARRIS) (2:23-cv-00455) of infringing that same, more recently acquired, “fifth” asserted patent.

Last December, Cobblestone Wireless, LLC filed a trio of Eastern District of Texas complaints, one against each of AT&T (AT&T Mobility), Deutsche Telekom (T-Mobile), and Verizon (Verizon Wireless) over the alleged infringement of the same four former Empire Technology Development LLC patents. A June complaint against Samsung followed, with Cobblestone asserting those four patents as well as a fifth, the new patent acquired in the intervening months, and now the plaintiff has circled back to accuse the same three wireless carriers—AT&T (AT&T Mobility) (2:23-cv-00380), T-Mobile (2:23-cv-00381), and Verizon Wireless (2:23-cv-00382)—of infringing that fifth patent, in another set of Eastern District of Texas complaints.

The networking campaign of Cobblestone Wireless, LLC has expanded in multiple ways, as the plaintiff has filed a new Eastern District of Texas complaint against new defendant Samsung (2:23-cv-00285) that adds a fifth patent to the litigation and as Ericsson and Nokia have moved successfully to intervene in the December 2022 suits that Cobblestone filed in the same district. There, the plaintiff sued AT&T (AT&T Mobility), Deutsche Telekom (T-Mobile), and Verizon (Verizon Wireless) over the alleged infringement of four Empire Technology Development LLC patents; the fifth patent now also in suit against Samsung hails from a different source.

A new campaign in the Eastern District of Texas has hit wireless carriers AT&T (AT&T Mobility) (2:22-cv-00474), Deutsche Telekom (T-Mobile) (2:22-cv-00477), and Verizon (Verizon Wireless) (2:22-cv-00478) with separate suits over the same four wireless communications patents. The accused products are networking devices and mobile devices; for example, cellular base stations and handsets (identifying in all three complaints lists of devices made by either Apple or Samsung) that support 3GPP 5G beamforming; cellular base stations that support handover between 4G LTE and 5G NR wireless networks; base stations that support 3GPP NG-GRAN supporting directional Supplementary Uplink (SUL) functionality; and cellular handsets that support Wi-Fi only automatic updates. The plaintiff is Cobblestone Wireless, LLC, an entity that converted from Delaware, its state of formation, to Texas.