ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,558,919, issued on Feb. 24, was assigned to DONGGUAN JINWANG CHILDREN PRODUCTS Co. LTD. (Dongguan, China).

"Wheel assembly structure and child activity center" was invented by Wei Li (Dongguan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure discloses a wheel assembly structure and a child activity center. The wheel assembly structure includes a connection base and a wheel assembly that is deployable. The wheel assembly is pivotally connected to the connection base. The wheel assembly has a deployment state and a storage state. An adjustment mechanism is provided between the connection base and the wheel assembly. The adjustm...