ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,597, issued on Jan. 13, was assigned to Gloom Foundry LLC (Austin, Texas).

"Multi-purpose functional ruck weight" was invented by Graham Westbrook (Austin, Texas), Kyle McClintock (Pflugerville, Texas), Nathan Tacha (Austin, Texas), Matt Lagusis (Dripping Springs, Texas) and Brian Shimansky (Austin, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatus and associated methods relate to a multi-purpose functional ruck weight (FRW). The FRW includes a packing mode, a two-handed swinging mode, and a dumbbell mode. The FRW is a weight reflectively mirrored about a bisecting longitudinal axis. The weight includes a top and a bottom surface. The F...