ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,506,999, issued on Dec. 23, was assigned to Dongguan Roker Electronics Co. Ltd. (Dongguan, China).
"Noise reducing TWS earphone with multi-speakers" was invented by Keqiang Li (Dongguan, China) and Hua Li (Dongguan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a noise reducing TWS earphone with multi-speakers including an earphone body and an earbud; where, an interior of the earphone body is provided with a planar speaker responsible for an intermediate frequency sound and a high frequency sound and a moving-coil speaker responsible for the intermediate frequency sound and a low frequency sound, an interior of th...