ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,441,635, issued on Oct. 14, was assigned to SEOUL VIOSYS Co. LTD. (Ansan-si, South Korea).
"Light emitting device" was invented by Byeong Cheol Ju (Ansan-si, South Korea), Jae Young Choi (Ansan-si, South Korea) and Ji Hyun Jo (Ansan-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A light emitting device comprises: a body which is arranged on the liquid surface that forms the boundary between air and liquid, and which can move up, down, right, or left in accordance with the floating of the liquid surface; and a light source unit, which is mounted on the body so as to emit light at the liquid, thereby processing the liquid."
The patent was...