ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,458,275, issued on Nov. 4, was assigned to RED MAPLE TRIALS INC. (Ottawa).

"Dispersal and exposure chamber systems and methods" was invented by Laura Haya (Ottawa), Suzanne Kelly (Ottawa), Edgar Matida (Ottawa), Rym Mehri (Ottawa), Stefan Van De Mosselaer (Ottawa) and William Yang (Ottawa).

According to the abstract* released by the U.S. Patent & Trademark Office: "Allergen exposure chambers (AECs) can be used to produce controlled exposure to allergenic and non-allergenic airborne particles but at present cannot be used for double-blind, placebo-controlled, randomized clinical trials currently required by regulatory authorities. Accordingly, inventive naturalistic exposure chambers (...