ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,471,564, issued on Nov. 18.
"Feed barrier" was invented by Nicolas Fournier (Esnoms Au Val, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A feed barrier includes a plurality of vertical flat gantries arranged in a row next to each other along a trough of a stable, each gantry determining, with the ground and said adjacent gantry or end post, an internal L-shaped space. A trap door associated with each portal and movable with respect to the latter in order to close or not close at least the lower side portion of said space, and an exclusively mechanical lock for switching the feed barrier from an access position to a locked position, and vice ver...