ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,458,829, issued on Nov. 4.
"Leg lift machine of magnetically controlled resistance type" was invented by Yu-Lun Tsai (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A leg lift of a magnetically controlled resistance type machine includes a main frame unit, a seat, two drive levers, two pedals, a linkage mechanism, two swinging mechanisms, and a magnetically controlled resistance mechanism. The seat is mounted on the main frame unit. The two pedals are mounted on the drive levers. The drive levers are connected with and limited by the linkage mechanism to reciprocally swing forward and backward and to move along a curved trajectory. The s...