In April 2021, Core Optical Technologies LLC rounded out its set of lawsuits against manufacturers of optical networking systems and hardware—ADVA, Cisco, Juniper Networks, and Nokia—with two more customer suits. Core Optical filed a suit against Alphabet (Google), Apple, AT&T, Bloomberg, Equinix, and Verizon (5:21-cv-03075), all alleged customers of Juniper Networks, in the Northern District of California, to which an earlier Central District of California suit against Juniper was recently transferred. Core Optical also filed a case against AT&T, Charter Communications, Comcast, Google, Microsoft, and Verizon (8:21-cv-00789), all alleged customers of Cisco, back in the Central District. At this point, the entire campaign centers around the alleged infringement of certain method claims of a single expired patent.
Having recently survived a motion challenging prior claims against Juniper Networks and Nokia, inventor-controlled Core Optical Technologies, LLC has made clear in its new Central District of California complaints—against Alphabet (Google), Apple, CenturyLink (d/b/a Lumen Technologies), Comcast, CoxCommunications, Nokia (Alcatel Submarine Networks), and Zayo Group (8:21-cv-00046); and both Amazon and Lumen Technologies (8:21-cv-00049)—that it is asserting only method claims of the single patent-in-suit. That patent generally relates to separating multiple optical signals (“waveforms”) on the same frequency using a cross-polarization interface canceler technique. Core Optical accuses the defendants in the -46 case of infringement through the use of products already identified in a prior suit filed directly against Nokia, while the plaintiff targets in the -49 case the defendants’ alleged use of products previously identified in a suit against ADVA.