ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,517, issued on March 18.
"Ear mounted cannular nasal breathing filter" was invented by Leland H. Huss (Concord, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ear mounted cannular nasal breathing filter provides an air mixing chamber to offset the effects of dry air caused by filtration by allowing for an admixture of filtered and pre-conditioned (humidified and heated) air. The air chamber features an internal or centered mixing chamber disposed below a one-way exhaust valve and above a filtering system. The air mixing chamber retains a predefined volume or percentage of exhausted breath that is mixed with a predefined volume or percenta...