ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,560,519, issued on Feb. 24, was assigned to Korea University Research and Business Foundation (Seoul, South Korea).

"Micro concentration monitoring apparatus" was invented by Hyung Min Lee (Seoul, South Korea) and Seung Beom Ku (Seongnam-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a micro concentration monitoring apparatus. A micro concentration monitoring apparatus includes: a variable frequency driver circuit unit that is coupled to a MEMS sensor and supplies constant power to the MEMS sensor within a set bandwidth; and a reading circuit unit that measures a resonance frequency displacement value of the MEMS sensor acco...