ALEXANDRIA, Va., July 21 -- United States Patent no. D1,136,269, issued on July 21, was assigned to Tricam Industries LLC (Eden Prairie, Minn.).
"Ladder button" was invented by Jackson T. Wilkey (Minneapolis), Benjamin M. Wernberg (Savage, Minn.), Joseph P. Foley (St. Paul, Minn.), Ryan P. Ellsworth (Chanhassen, Minn.) and Benjamin P. Williams (Chaska, Minn.).
The patent was filed on Aug. 23, 2023, under Application No. D/910,666.
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