ALEXANDRIA, Va., Nov. 6 -- United States Patent no. D1,100,509, issued on Nov. 4, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).
"Cleaning brush" was invented by Matthew D. Chaffee (Minneapolis), Mario A. Davenport (St. Paul, Minn.), Mark W. Baldwin (Woodbury, Minn.) and Aaron White (Menomonie, Wis.).
The patent was filed on June 5, 2023, under Application No. D/894,044.
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