ALEXANDRIA, Va., July 15 -- United States Patent no. 12,661,270, issued on June 23, was assigned to Huizhou Saienchuangke Technology Co. Ltd (Huizhou, China).
"Earbud" was invented by Lixiang Liao (Dongguan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An earbud includes a connection member, a regulating valve, an earbud body and a bladder. The connection member includes opposite first and second ends and defines a through hole extending through the first end and the second end. The regulating valve defines a flow channel therein and incudes a connection end and a working end. The connection end is tightly connected to the connection member, and the working end defines a flat adjustment opening. The ...