ALEXANDRIA, Va., Aug. 12 -- United States Patent no. D1,088,392, issued on Aug. 12, was assigned to AMSA Inc. (Boulder, Colo.).
"Tiered cart" was invented by Ivor Michel Walter (Boulder, Colo.) and Wilson Zeng (Foshan, China).
The patent was filed on July 10, 2023, under Application No. D/879,538.
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