ALEXANDRIA, Va., Aug. 12 -- United States Patent no. D1,087,642, issued on Aug. 12, was assigned to Ningbo Yousun Imp.and Exp. Co. Ltd (Zhejiang, China).
"Convertible sofa bed" was invented by Yizhu Sun (Zhejiang, China).
The patent was filed on March 1, 2025, under Application No. D/991,592.
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