ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,420,447, issued on Sept. 23, was assigned to Samsung E&A Co. Ltd. (Seoul, South Korea).

"Nozzle of auto-agitating type 3D printer for construction" was invented by Ho Sung Na (Hanam, South Korea), Dong Hyun Kim (Seoul, South Korea), Ju In Park (Seoul, South Korea), Hyung Woo In (Seoul, South Korea) and Hye Jin Ryu (Hanam, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a 3D printer for construction for printing and forming various structures, in which agitating blades 45 capable of auto-rotation are mounted inside a nozzle 10 discharging a printing material such as concrete or mortar, to thereby enable agita...