ALEXANDRIA, Va., Aug. 26 -- United States Patent no. D1,090,801, issued on Aug. 26, was assigned to Hunan Douhe Intelligent Appliance Co. Ltd (Changsha, China).
"Air purifier" was invented by Xiuwen Ma (Hunan, China) and Xianhao Cai (Hunan, China).
The patent was filed on Oct. 13, 2023, under Application No. D/904,977.
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