ALEXANDRIA, Va., April 15 -- United States Patent no. 12,599,808, issued on April 14, was assigned to LG Electronics Inc. (Seoul, South Korea).
"Mat-type exercise device" was invented by Jeongjoon Roh (Seoul, South Korea) and Jeong Uk Lee (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Proposed is a mat-type exercise device. The mat-type exercise device may include a plurality of wheel modules. Each of the plurality of wheel modules is installed in the device body such that the wheel module can move between a protrusion position at which the wheel module protrudes from the lower surface of the device body and a retraction position at which the wheel module is retracted to the inside of the...