ALEXANDRIA, Va., Aug. 5 -- United States Patent no. D1,138,101, issued on Aug. 4, was assigned to Birkenstock IP GmbH (Linz am Rhein, Germany).
"Mule" was invented by Celia Martos Morales (Linz am Rhein, Germany).
The patent was filed on Nov. 18, 2025, under Application No. D/033,455.
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