ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,752,146, issued on Oct. 6, was assigned to FUERALLEX LLC (Parrish, Fla.).
"Expander with degressive stress behaviour" was invented by Yannik Weber (Berlin).
According to the abstract* released by the U.S. Patent & Trademark Office: "An expander for training muscles, especially fast-acting muscle fibers, having an elastic element that can expand against its restoring force for the purpose of training, as well as a method for manufacturing such an expander. The elastic element consists of a composite of at least two different elastic materials, with a first elastic material being instantiated as a closed line pattern with an offset or non-offset four-fold or with a sixfold unit cell, wi...