ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,989, issued on Jan. 13, was assigned to KOREA RAILROAD RESEARCH INSTITUTE (Gyeonggi-do, South Korea).

"Assembly type bridge lower structure having socket type elastic duct coupler and method of constructing the same" was invented by Taehoon Kim (Gyeonggi-do, South Korea), Ki Young Eum (Gyeonggi-do, South Korea), InHo Yeo (Seoul, South Korea), Yun Suk Kang (Gyeonggi-do, South Korea), Dae-Sang Kim (Gyeonggi-do, South Korea), Choon Seok Bang (Gyeonggi-do, South Korea), Sungil Kim (Gyeonggi-do, South Korea), Jeong Ryol Shin (Gyeonggi-do, South Korea) and Ki Hyun Kim (Seoul, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosur...