ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,704,094, issued on Aug. 11, was assigned to RTX Corp. (Farmington, Conn.).

"Multi-valve modulated core ventilation" was invented by Murat Yazici (Glastonbury, Conn.) and Marc J. Muldoon (Marlborough, Conn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A gas turbine engine is provided that includes fan, compressor, combustor, and turbine sections, an outer casing, an outside core annular region, and a fan air circulation system. The engine has a core gas path that is disposed radially inside of the outer casing. A fan bypass air duct is defined by inner and outer radial flow path boundaries. The outside core annular region is disposed radially between t...