ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,005, issued on Nov. 18, was assigned to Wonderland Switzerland AG (Steinhausen, Switzerland).
"Stroller frame and stroller" was invented by Mingxing Sun (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A stroller frame (100) includes a front leg (10), a bottom tube (30), a rear leg (20), an upper support member (40) and a lower support member (50). The front leg (10), the bottom tube (30), the lower support member (50) and the upper support member (40) are pivotally connected to each other to form a four-bar linkage structure. The rear leg (20) is connected to an end of the bottom tube (30). A lock mechanism (60) is disposed at a piv...