ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,440,715, issued on Oct. 14, was assigned to Gym-in-a-Box LLC (Goose Creek, S.C.).
"Variable mass dumbbell systems" was invented by Stacey M. Lewis-Dove (Moncks Corner, S.C.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Dumbbell systems provide a grip; a weight-engagement device having weight-engagement ports; a plurality of weight plates, each weight plate having a grip-engagement port; wherein the plurality of weight plates provides an incrementally-variable mass of weights. Further, a telescoping dumbbell system provides a cylindrical base comprising a grab and optionally a circular bearing race rotationally supporting the grab; a base weight selecti...