AFP: Apple fires back in patent war with Samsung

SAN FRANCISCO — Apple escalated its legal fight with Samsung by asking the US International Trade Commission (USITC) to block imports of some of the South Korean firm's smartphones and tablet computers. In a filing Tuesday, Apple asked the USITC to look into its complaint that Samsung is infringing on the California-based company's patents in "electronic digital media devices" including its Galaxy lines of smartphones and tablets.