ALEXANDRIA, Va., July 9 -- United States Patent no. 12,356,128, issued on July 8, was assigned to AAC Technologies (Nanjing) Co. Ltd. (Nanjing, China).
"Multifunctional sound device" was invented by Lubin Mao (Nanjing, China), Jie Ma (Nanjing, China), Yun Tang (Nanjing, China) and Ziang Li (Nanjing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A multifunctional sound device includes a housing, a sound unit, and a motor assembly. The sound unit includes a frame, a vibration system, and a magnetic circuit system. The motor assembly includes a vibration unit and elastic components. The vibration unit includes driving coils and a mass block. The driving coils are fixed to the mass block and located in a ...