ALEXANDRIA, Va., Jan. 28 -- United States Patent no. D1,110,630, issued on Jan. 27, was assigned to BEIJING ROBOROCK TECHNOLOGY Co. LTD. (Beijing).
"Dust filter for cleaning appliance" was invented by Leilei Guan (Beijing) and Baokui Zhang (Beijing).
The patent was filed on Sept. 5, 2024, under Application No. D/522,493.
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