ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,443,970, issued on Oct. 14, was assigned to Walmart Apollo LLC (Bentonville, Ark.).

"System and method for determining content effectiveness based on dwell time estimation" was invented by Philip Barrett Freeman (Rogers, Ark.), Adam Christian Henrie (Bentonville, Ark.) and Amir Alonzo Jenkins (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods for determining content effectiveness are disclosed. In some examples, a media device located in a store of an entity displays content about a product. A shopping assistant device owned by the entity has an asset identifier (ID) thereon and is used by a customer to assist the custo...