ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,259, issued on May 6, was assigned to WONDERLAND SWITZERLAND AG (Steinhausen, Switzerland).
"Wheeled carrying apparatus" was invented by Zheng-Wen Guo (Dongguan, China), Er Xue Wang (Dongguan, China), Shoufeng Hu (Dongguan, China), Mingxing Sun (Dongguan, China) and Cheng-Nan Chiang (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A wheeled carrying apparatus includes a handle frame rotatable relative to a standing frame between a first and a second position, a wheel mount pivotally connected with the standing frame, a wheel mount latch adapted to lock and unlock the wheel mount with respect to the standing frame, an actuating assemb...