ALEXANDRIA, Va., Sept. 23 -- United States Patent no. D1,094,581, issued on Sept. 23, was assigned to Yi Wu U-Touch Plastic Rubber Products Co. Ltd (Yiwu, China).
"Building block" was invented by Qiong Xiao (Yiwu, China).
The patent was filed on April 13, 2022, under Application No. D/834,587.
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