ALEXANDRIA, Va., March 24 -- United States Patent no. 12,587,789, issued on March 24, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Coaxial speaker" was invented by Zhang Ren (Changzhou, China) and Zhiwei Zhong (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A coaxial speaker including a basket frame, a magnetic circuit system, a woofer vibration system, and a tweeter vibration system. The magnetic circuit system is provided with a cavity, a tweeter magnetic gap, and a woofer magnetic gap. The woofer vibration system includes a woofer diaphragm and a woofer voice coil. The tweeter vibration system includes a tweeter diaphragm and a tweeter voice coil. The woofer mag...