ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,548,464, issued on Feb. 10.

"Tile based logical teaching device" was invented by Keerthi Gunasekaran (Shorewood, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A versatile Logic teaching system comprising a plurality of interchangeable functional tile units representing binary values representing various logic functions and connector tiles linking the functional tile units. In use, functional tile units and connector tiles can be arranged to create logical circuit pathways representative of real-world scenarios. Construction of logical circuit pathways can follow one or more rules and a scoring system to engage users."

The patent was filed on Oct...