ALEXANDRIA, Va., Feb. 11 -- United States Patent no. D1,112,995, issued on Feb. 10, was assigned to Shenzhen Simao Trade Co. Ltd. (Shenzhen, China).
"Pet stairs" was invented by Huishan Liu (Quanzhou, China).
The patent was filed on April 30, 2024, under Application No. D/939,955.
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