ALEXANDRIA, Va., June 17 -- United States Patent no. 12,311,224, issued on May 27, was assigned to IDA COVERTRUCK S.L. (Madrid).
"Muscle-building apparatus" was invented by Juan Jose Guerrero Padron (Madrid).
According to the abstract* released by the U.S. Patent & Trademark Office: "A muscle-building apparatus for building the muscles of a user performing a physical exercise, comprising a frame on which are assembled a treadmill which is displaceable in a longitudinal direction and in opposite senses, a force generator that supplies an adjustable pushing or dragging force, and a swivelling support mechanically coupled to the force generator for the user to perform a pushing or dragging exercise on the swivelling support."
The patent was...