Six men, including three professors at China's Tianjin University, were accused Tuesday by the U.S. Attorney's Office of stealing key mobile phone technology from Silicon Valley tech company Avago Technologies and Massachusetts-based Skyworks Solutions. U.S. Attorney Melinda Haag announced a 32-count indictment and the arrest Saturday of Tianjin University professor Hao Zhang, 36, a former Skyworks engineer, under the Economic Espionage and Theft of Trade Secrets Act.