USB Bridge Solutions, LLC has launched a new litigation campaign, suing ACI Group (Avant Technology) (1:17-cv-01159), Kezoll Technology and Shenzhen KingSpec Electronics Technology (1:17-cv-01160), and Melco Holdings (Buffalo) (1:17-cv-01158) over a single patent generally related to an interface for a “mass storage device”. At issue are the defendants’ portable hard drives with Serial ATA (Buffalo, Shenzhen) or ATA (Avant) internal interfaces and having an external USB interface.