ALEXANDRIA, Va., March 5 -- United States Patent no. 12,240,264, issued on March 4.
"Foldable file" was invented by Shengzhou Li (Hunan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a foldable file comprising a first panel, a second panel, and a third panel arranged and coupled together in sequence, the first panel and the second panel hinged by a first hinge assembly, and the second and third panel hinged by a second hinge assembly, enabling the foldable file to switch between an unfolded state and a folded state, wherein at least one lower side edge of the third panel includes a convex edge, and the convex edge protrudes outward compared to a corresponding upper side...