ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,696,952, issued on Aug. 4, was assigned to Xelero Technology LLC (Hillsborough, N.J.).

"Footwear sole assembly" was invented by Daniel Werremeyer (Hillsborough, N.J.) and Robert Tighe (Easton, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sole assembly for footwear includes a footbed made of a first resilient material with a lower durometer than a surrounding rocker frame composed of a second resilient material. During a user's heel-to-toe motion, medial and lateral rolling elements extending downward from the frame form convex longitudinal curves from heel to midfoot, guiding the transition from heel strike to toe-off. Beneath the footbed, a rigi...