ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,377,898, issued on Aug. 5, was assigned to Wonderland Switzerland AG (Steinhausen, Switzerland).

"Folding hook structure and carriage frame and as well as baby carriage having the same" was invented by Xiaojian Zhang (Guangdong, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A folding hook structure comprising: a shell, fixed to the first object, and at least partially accommodates other parts of the folding hook structure; a rotating disk, fixed to the second object, and disposed in the shell to be rotatable around a rotation center in respect to the shell, with a folding hook groove disposed on a disk surface of the rotating disk, the folding hoo...