ALEXANDRIA, Va., Sept. 8 -- United States Patent no. D1,147,456, issued on Sept. 8, was assigned to SHENZHEN MEILIWANG SMART TECHNOLOGY Co. LTD. (Shenzhen, China).
"Step ladder" was invented by Sheng Li Wang (Guangdong, China).
The patent was filed on Nov. 19, 2024, under Application No. D/973,901.
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