ALEXANDRIA, Va., June 9 -- United States Patent no. D1,072,573, issued on April 29, was assigned to Zhejiang Lvwu Industry and Trade Co. Ltd. (Jinhua, China).
"Tumbler" was invented by Caihe Long (Hubei, China).
The patent was filed on July 22, 2024, under Application No. D/953,509.
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