ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,923, issued on Jan. 13, was assigned to HI-P (XIAMEN) PRECISION PLASTIC MANUFACTURING Co. LTD. (Xiamen, China).

"Manufacturing method of a toothbrush head" was invented by Ping Ruan (Xiamen, China), Xiaojia Liu (Xiamen, China), Qiufeng Guo (Xiamen, China), Zhiqiang Zhang (Xiamen, China), Yingsheng Chen (Xiamen, China), Shuling Cui (Xiamen, China) and Baochang Ge (Xiamen, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a brush head fixture for production of a toothbrush head and a manufacturing method of the toothbrush head. The brush head fixture includes a fixture main body, a bristle accommodating part, a material sealing surfac...