US Patent Issued on July 21 for "Floatable concrete block structure and method for manufacturing same" (South Korean Inventor)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,686,474, issued on July 21.

"Floatable concrete block structure and method for manufacturing same" was invented by Sangki Kim (Busan, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A floatable concrete block structure is manufactured by fabricating individual concrete blocks on land, and then assembling and coupling the individual concrete blocks underwater or on a water surface. An assembly buoyancy chamber is formed inside by the first concrete block and the second concrete block, the inflow of water into the assembly buoyancy chamber is prevented by a first watertight packing, and so on, and the first concrete block and the second concret...