ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,413,897, issued on Sept. 9, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Coaxial speaker" was invented by Ronglin Linghu (Changzhou, China), Yun Tang (Changzhou, China), Bo Xiao (Changzhou, China) and Wei Song (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a coaxial speaker including a fixing member, a magnetic circuit system, a voice coil, a first vibration system connected with the voice coil, and a second vibration system connected with the voice coil and arranged surrounding the first vibration system. The second vibration system locates coaxially with the first vibration s...