ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,728,339, issued on Sept. 8.
"Pull-up frame" was invented by Jianchao Lin (Yongkang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The application relates to the technical field of sports equipment and specifically discloses a pull-up frame, comprising an exercise device and a support base, wherein the exercise device includes a first connecting frame and a second connecting frame, wherein the first connecting frame and the second connecting frame are both connected to the support base. The support base comprises a first supporting mechanism and a second supporting mechanism. Through the above technical scheme, when the user stores the folded pull...