ALEXANDRIA, Va., April 7 -- United States Patent no. D1,121,770, issued on April 7, was assigned to TIANJIN YUANZHI ENVIRONMENTAL TECHNOLOGY Co. LTD. (Tianjin, China).
"Refrigerator filter" was invented by Lin Lou (Tianjin, China), Kai Zhang (Tianjin, China), Xin Guan (Tianjin, China) and Jingguan Du (Tianjin, China).
The patent was filed on April 5, 2024, under Application No. D/936,044.
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