Hybrid Audio LLC has added another round of defendants in its litigation campaign seeking limited past damages for infringement of a single expired, reissued, and re-examined patent (RE40,281). The ‘281 patent is alleged to be essential to the MP3 standard for processing audio information, and the new complaints target computing devices that use the standard made and/or sold by Archos (1:16-cv-12424), Cowon Systems (1:16-cv-12423), Creative Technology (1:16-cv-12422), iRiver (1:16-cv-12421), JVC Kenwood (1:16-cv-12420), and Western Digital (SanDisk) (1:16-cv-12419).