Digital Stream IP, LLC, an affiliate of Monument Patent Holdings, LLC, has added two cases to its radio communications campaign, suing CBS (CBS Radio) (2:17-cv-00313) and iHeartMedia (2:17-cv-00315) over one (the ‘913 patent) of the three patents (6,757,913; 7,962,090; 8,265,545) already at issue. The patents generally relate to digital audio receivers; Digital Stream IP’s earlier cases have focused on the sale of satellite radio units, made by, for example, Sirius XM, and sold in automobiles, including the vehicles sold by defendants BMW, Daimler (Mercedes-Benz), GM, Honda, and Nissan. These two newest complaints target digital audio transmitters used with CBS and iHeart radio stations.