ALEXANDRIA, Va., June 25 -- United States Patent no. D1,080,788, issued on June 24, was assigned to Lappset Group Oy (Rovaniemi, Finland).
"Vertical maze" was invented by Mikko Partanen (Rovaniemi, Finland) and Oskari Koistinen (Rovaniemi, Finland).
The patent was filed on Sept. 12, 2022, under Application No. D/866,413.
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