ALEXANDRIA, Va., June 17 -- United States Patent no. 12,317,032, issued on May 27, was assigned to AAC Technologies (Nanjing) Co. Ltd. (Nanjing, China).
"Multifunctional sounding device" was invented by Lubin Mao (Nanjing, China), Ziang Li (Nanjing, China), Yun Tang (Nanjing, China) and Jie Ma (Nanjing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention provides a multifunctional sounding device, which includes a housing with a containment space and a sounding unit suspended in the containment space. The sounding unit includes a frame, a vibration system and a magnetic circuit system. The magnetic circuit system includes a main magnet and a secondary magnet. The multifunctional sounding devic...