Three NPEs formed in Texas in June 2015, Pherah LLC, Mod Stack LLC, and Packet Tread LLC, have kicked off second waves in each of their litigation campaigns over the past month. In the first five days of July, Pherah filed 18 individual complaints, suing the same number of companies of infringing a single patent (RE44,652) through provision of interactive sales features on their websites. A couple of weeks later, Mod Stack asserted a patent (7,460,520) generally related to connecting telephone calls between legacy circuit-switched networks and newer packet-switched networks against the networking products of six defendants: AudioCodes (2:16-cv-00796), Calix (2:16-cv-00797), Metaswitch Networks (2:16-cv-00798), Mitel (2:16-cv-00799), Shoretel (2:16-cv-00800), and Synway Information Engineering (2:16-cv-00801). These new rounds of filings by Mod Stack and Pherah join a second wave of suits lodged by Packet Tread LLC earlier this month (see “Packet Tread’s Campaign Shifts to Unified Communication Systems“, July 2015).