ALEXANDRIA, Va., June 19 -- United States Patent no. 12,330,073, issued on June 17.
"Movable puzzle platform" was invented by Xiaoling Che (Hubei, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A movable puzzle platform includes a puzzle board having a top surface and a board accessible unit having a first moving member, a second moving member, and a first bearing unit coupled between the first moving member and the second moving member. A first circumferential surface of the first moving member is engaged with a second circumferential surface of the second moving member via the first bearing unit to enable the second moving member to be coaxially rotated with respect to the first moving member. The fi...