ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,533,599, issued on Jan. 27, was assigned to Shenzhen BLACK TECH Co. Ltd. (Shenzhen, China).
"Building block" was invented by Lianwu Huang (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A building block includes a building block main body and a magnet. The building block main body is formed by a plurality of sidewalls connected to each other. A crossed corner is formed at a junction between adjacent sidewalls. An inner enclosure wall and a stop column are arranged at the crossed corner. A compartment is formed by surrounding the inner enclosure wall and the sidewall. The stop column is positioned in the compartment, and the inner enclosu...