ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,556,846, issued on Feb. 17, was assigned to AAC KAITAI TECHNOLOGIES (WUHAN) Co. LTD (Wuhan, China).
"Earphone" was invented by Yu Shen (Shenzhen, China), Yiwei Zhou (Shenzhen, China), Qiang Dan (Shenzhen, China) and Yang Li (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An embodiment of the present disclosure provides an earphone, which includes a housing with a cavity, a first speaker housed in the cavity for producing low-frequency sounds, a second speaker for producing mid to high frequency sounds, and a sound damping mesh. The housing includes a sound outlet penetrating therethrough, and the cavity is connected with the outside thro...