ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,407,973, issued on Sept. 2, was assigned to Huawei Technologies Co. Ltd. (Shenzhen, China).

"Earphone" was invented by Tienan Zhang (Dongguan, China), Haibo Shan (Dongguan, China), Yan Li (Shenzhen, China) and Dasheng Mo (Dongguan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An earphone is provided, and includes a housing, a loudspeaker, and a noise cancellation microphone, the housing comprises an internal space, and a sound pickup channel. The noise cancellation microphone is connected to the communication surface by the sound pickup channel. The housing comprises an outer housing and a frame, the housing is provided with the internal space a...