DENVER - The 10th Circuit U.S. Court of Appeals on Aug. 8 denied interlocutory appeal of a federal district court's denial of class certification of premium cable subscribers who claim that Cox Enterprises Inc. unlawfully tied access to its premium services with mandatory rentals of its cable boxes (Bradley Gelder, et al. v. CoxCom Inc., et al., No. 12-706, 10th Circ.; 2012 U.S. App. LEXIS 16536).