ALEXANDRIA, Va., April 7 -- United States Patent no. D1,121,302, issued on April 7.
"Heel portion" was invented by Yang Lin (Hunan, China), Changsheng Cao (North Bergen, N.J.), Daocheng Rao (Fujian, China) and Qianhui Zheng (Guangdong, China).
The patent was filed on Jan. 8, 2024, under Application No. D/907,733.
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