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, Cox Communications, 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.