ALEXANDRIA, Va., June 12 -- United States Patent no. 12,296,276, issued on May 13.
"Little genius producing puzzles" was invented by Magdalena Henrietta Elizabetha Pieters (Pretoria, South Africa) and Lize Joey Mai Johnston (Los Angeles).
According to the abstract* released by the U.S. Patent & Trademark Office: "A series of educational multi-layered jigsaw puzzles based on the K-12 school curriculum in which puzzles progress in difficulty and pieces have liquid freeform cut lines, cut along the outlines or silhouette of the image, with puzzle pieces getting progressively smaller from top to bottom creating a tiered basin when all pieces are removed, where some layers are interchangeable and some are double-sided. In mathematical puzzles,...