ALEXANDRIA, Va., June 9 -- United States Patent no. 12,289,590, issued on April 29, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Coaxial speaker" was invented by Zhang Ren (Shenzhen, China) and Zhiwei Zhong (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a coaxial speaker including a support ring, a magnetic circuit system, a first vibration system and a second vibration system fixed on both side of the support ring and arranged coaxially. The first vibration system includes a first diaphragm and a first voice coil. The second vibration system includes a second diaphragm and a second voice coil. The magnetic circuit system includes a f...