ALEXANDRIA, Va., July 28 -- United States Patent no. 12,690,690, issued on July 28, was assigned to Inno-Sports Co. Ltd. (Xiamen, China).
"Foldable and adjustable frame" was invented by Kwan Jun Choi (Xiamen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A frame includes a middle unit, a first unit and a second unit. Each of the middle, first and second units includes pivotally connected longitudinal members. Each of the first and second units also includes lateral members pivotally connected to its longitudinal members and the middle unit. The lateral and longitudinal members of the middle, first and second units are foldable onto each other, making the frame very compact when folded. The lateral mem...