ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,472, issued on March 25.
"Dynamic weight plate retention collar" was invented by Alireza Yazdanshenas (Richardson, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A barbell collar is described having a front ring coupled to a body collar. The body collar comprises three contact pockets formed into the body of the body collar. Three removable contact patches are inserted into the three contact pockets. One of the contact patches is dynamic and can be triggered to advance forward and retract backward by an attached adjustable fastener. The dynamic contact patch grips onto an outer surface of a barbell inserted into a cavity of the barbell collar...