ALEXANDRIA, Va., July 3 -- United States Patent no. D1,081,278, issued on July 1, was assigned to HANGZHOU FREETRON INDUSTRIAL Co. LTD. (Zhejiang, China).
"Vacuum container" was invented by Qinyun Xie (Zhejiang, China) and Ziliang Mao (Zhejiang, China).
The patent was filed on Oct. 13, 2022, under Application No. D/856,462.
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