ALEXANDRIA, Va., Aug. 25 -- United States Patent no. D1,143,531, issued on Aug. 25, was assigned to BIRKENSTOCK IP GMBH (Linz am Rhein, Germany).
"Mule" was invented by Leonie Bachstaedter (Linz am Rhein, Germany).
The patent was filed on Nov. 21, 2025, under Application No. D/034,075.
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