ALEXANDRIA, Va., May 5 -- United States Patent no. 12,617,447, issued on May 5, was assigned to WONDERLAND SWITZERLAND AG (Steinhausen, Switzerland).

"Wheel braking mechanism, frame, and child carrier" was invented by Xiaolong Yi (Dongguan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application relates to a wheel braking mechanism, a frame and a child carrier. The wheel braking mechanism includes a wheel base housing assembly, a braking assembly mounted in the wheel base housing assembly, and a braking pin connected to the braking assembly. A side wall of the wheel base housing assembly is provided with a sliding hole configured to allow the braking pin to extend through. The braking pi...