ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,089, issued on April 15, was assigned to Hamilton Sundstrand Corp. (Charlotte, N.C.).

"Additively manufactured heat exchanger with special surface roughness" was invented by John Giuliano (North Granby, Conn.) and Viktor Kilchyk (Lancaster, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A heat exchanger core comprises a plurality of tubes extending along a first fluid axis, each of the plurality of tubes comprising a leading edge, a trailing edge opposite the leading edge, and a pair of oppositely disposed sidewalls extending from the leading edge to the trailing edge. The leading edge, trailing edge, and the pair of sidewalls define an inner su...