ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,459, issued on Jan. 13, was assigned to FEELBAT (Saint-Denis, France).

"System for measuring a changing crack in a wall or the like" was invented by Jean-Christophe Habot (Saint Gilles les Hauts, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system for measuring a changing crack, comprises: a measurement device comprising a body bearing a measurement instrument and having a first positioning means, and a movable member comprising a second positioning means; at least two targets that are able to cooperate with a positioning means, wherein the at least two targets are hemispherical in shape and wherein the positioning means consist of rings ...