ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,700,328, issued on Aug. 4.

"Card learning machine" was invented by Shican Liu (Anqing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A card learning machine, in which the light generated by the light-emitting element can pass through the card, such that the identification part forms an identification projection for learning on the light-transmitting button. Through the provided bubble-shaped component, the card learning machine can interact with children, which can not only improve the fun of the learning process, enhance the attractiveness of the card learning machine, and improve the learning effect; but also, can train children's ability of tou...