ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,120, issued on March 17.

"Boiler for making hot water and room heating water available simultaneously" was invented by Sung-Hwan Choi (Seoul, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a boiler for making hot water and room heating water available simultaneously, which is capable of enabling a user to use hot water and room heating simultaneously. According to the present disclosure, a thermal loss of room heating water may be minimized because the room heating water is independently supplied to a room heating pipe and returned regardless of the use of hot water, and the hot water with a high temper...