ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,746,500, issued on Sept. 29, was assigned to Donaldson Co. Inc. (Bloomington, Minn.).

"Filter media, filter media packs, and filter elements" was invented by Daniel E. Adamek (Bloomington, Minn.), Scott M. Brown (Faribault, Minn.) and Mark A. Sala (Lino Lakes, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments include an air filtration media pack comprising a plurality of layers of fluted media, each layer comprising a facing sheet and a fluted sheet, the fluted sheet comprising a first plurality of flutes and a second plurality of flutes, the first and second plurality of flutes being arranged in a parallel flow configuration; wherein th...