ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,788, issued on March 31, was assigned to HANWHA Corp. (Seoul, South Korea).

"Device method operating electronic detonator having response relay function" was invented by Jeong Ho Choi (Cheongju-si, South Korea) and Se Ho Kim (Cheongju-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A device and a method thereof for operating an electronic detonator having a response relay function are proposed. The device includes a command signal reception unit configured to receive a command signal transmitted from a blasting control system, a response signal transmission unit configured to transmit a response signal responsive to the received comm...