ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,697,458, issued on Aug. 4, was assigned to Breathe Technologies Inc. (Irvine, Calif.).

"O 2 concentrator with sieve bed bypass and control method thereof" was invented by Tom Westfall (Irvine, Calif.) and Enrico Brambilla (Irvine, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An oxygen concentrator includes one or more adsorbent sieve beds operable to remove nitrogen from air to produce concentrated oxygen gas at respective outlets thereof, a product tank fluidly coupled to the respective outlets of the sieve bed(s), a compressor operable to pressurize ambient air, one or more sieve bed flow paths from the compressor to respective inlets of the s...