ALEXANDRIA, Va., July 7 -- United States Patent no. 12,672,689, issued on July 7, was assigned to SNO GRO LLC (Glenview, Ill.).

"Expandable footwear" was invented by Callista Sukohardjo (Rancho Dominguez, Calif.), Benjamin James Miller (Tigard, Ore.) and Joan Park (Glenview, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A size expandable footwear. The footwear comprises an outsole affixed to a bottom surface of a lower segment, which features a mechanism that allows for size adjustment and locking at various desired lengths (sizes) of the footwear. The size adjustment mechanism is comprised of an expandable section integrated within the lower segment, such that it facilitates mechanical expansion in th...