ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,419,441, issued on Sept. 23, was assigned to Wonderland Switzerland AG (Steinhausen, Switzerland).
"Fixing device and passenger device as well as carrying device using the same" was invented by Xiuping Fu (Steinhausen, Switzerland) and Xiaohong Xiao (Steinhausen, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosure provides a fixing device, and a passenger device and a carrying device using fixing device. The fixing device is used to detachably fix the carrying device to the passenger device, and includes an engaging mechanism and an engaging seat. Among them, after the engaging mechanism is engaged into the engaging seat, the enga...