ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,480,274, issued on Nov. 25.
"Underground facility and method of constructing underground facility" was invented by Young Jong Son (Gyeongsangbuk-do, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein are a construction structure and method for an underground facility. The construction structure for an underground facility includes: a facility body including a foundation constructed by pouring concrete, and a cover member extending in the front-back direction and having both ends configured to extend downward and be fixed to the top surface of the foundation to form a tunnel-shaped space therebelow; and a soil cover layer formed ...