ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,446,654, issued on Oct. 21.
"Auxiliary or integrated inner sole structure for footwear" was invented by Marc Cormier (Montreal).
According to the abstract* released by the U.S. Patent & Trademark Office: "An inner sole structure for being mounted inside footwear for engagement by the foot comprises a middle sole part covered by a top part. The middle sole part defines has a thickness providing for supporting the foot and defines a longitudinal channel devoid of any material therein and defining an opening covered by the top sole part. When the inner sole structure is inside the footwear and engaged by the foot, the longitudinal channel is positioned under the foot of the wearer and i...