ALEXANDRIA, Va., May 19 -- United States Patent no. 12,630,208, issued on May 19, was assigned to Wonderland Switzerland AG (Steinhausen, Switzerland).
"Stroller" was invented by Wanquan Zhu (Steinhausen, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A stroller includes a frame, a seat fixing base and a seat. The seat fixing base is disposed on the frame. The seat fixing base has an engaging structure. The seat includes an unlock button and a plurality of engaging members. The unlock button abuts against the engaging members. The engaging members engage with the engaging structure to restrain the seat on the seat fixing base. When the unlock button is pressed, the unlock button drives the engagi...