ALEXANDRIA, Va., Sept. 24 -- United States Patent no. D1,149,021, issued on Sept. 22, was assigned to BMC Medical Co. Ltd. (Beijing).
"Mask" was invented by Yajie Wang (Beijing), Long He (Beijing), Mingzhao Zhou (Beijing) and Zhi Zhuang (Beijing).
The patent was filed on Jan. 31, 2024, under Application No. D/926,776.
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