US Patent Issued to Guangdong Yingxin Technology on Sept. 23 for "Electric toothbrush device with built-in shrapnel assembly" (Chinese Inventor)

ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,419,411, issued on Sept. 23, was assigned to Guangdong Yingxin Technology Co. Ltd. (Dongguan, China).

"Electric toothbrush device with built-in shrapnel assembly" was invented by Mingyuan Li (Gaozhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An electric toothbrush device with a built-in shrapnel assembly includes a toothbrush head, a brush assembly and an electric motor. A built-in shrapnel assembly is disposed in the cavity, and the built-in shrapnel assembly is disposed to abut against the drive shaft. The built-in shrapnel assembly includes an arch-shaped protrusion arching towards the drive shaft. A side of the drive shaft facing the ar...