ALEXANDRIA, Va., June 16 -- United States Patent no. D1,075,661, issued on May 20, was assigned to Xiamen Retone Hearing Technology Co. Ltd. (Xiamen, China).
"Charging box" was invented by Yiquan Shi (Xiamen, China) and Chengxiang Zhang (Xiamen, China).
The patent was filed on Jan. 19, 2023, under Application No. D/882,790.
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