ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,503,845, issued on Dec. 23.

"Self-building kit system" was invented by Sangwook Park (Seoul, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "According to an example embodiment of the present disclosure, there is provided a self-building kit system including a first kit. The first kit includes: first modules of a first shape having two modules disposed opposite each other, and each including one or more first fitting portions cut out to a first length (d1) in the direction of the center thereof; and second modules of a second shape having N (N is a natural number) modules disposed between the two first modules, and each including one or more s...