ALEXANDRIA, Va., Sept. 30 -- United States Patent no. D1,095,889, issued on Sept. 30, was assigned to TOPRO INDUSTRI AS (Gjovik, Norway).
"Stair assistance device" was invented by Ingrid Lonar (Trondheim, Norway) and Daniel Ihlen Ekelund (Trondheim, Norway).
The patent was filed on May 25, 2022, under Application No. D/864,379.
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