ALEXANDRIA, Va., July 21 -- United States Patent no. D1,135,535, issued on July 21, was assigned to Zhejiang Sunclose Technology Co. Ltd. (Jinhua, China).
"Portable cooler" was invented by Huajian Zhang (Jinhua, China) and Jingping Li (Jinhua, China).
The patent was filed on March 31, 2025, under Application No. D/996,228.
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