ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,560,584, issued on Feb. 24, was assigned to UNIVERSITY OF TARTU (Tartu, Estonia).

"Method and apparatus for assessing gas exchange of plants" was invented by Bakhtier Rasulov (Tartu, Estonia), Roman Leinus (Tartu, Estonia) and Hannes Kollist (Tartu, Estonia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method and apparatus are disclosed for assessing gas exchange of plants. The method includes receiving in a gas analyzer a plurality of test air samples from a leaf chamber corresponding respectively to first and second plant leaf samples received separately and in sequence in the leaf chamber while being exposed to light to form the first and second t...