ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,641, issued on May 20, was assigned to Rolls-Royce plc.

"Ram-air duct system" was invented by Graeme E F Sutcliffe (Derby, Great Britain), Richard G Mochrie (Guilford, Great Britain) and Jade Whittle (Derby, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A ram-air duct system includes a ram-air duct configured to receive a flow of ram-air from a ram-air inlet and discharge the flow to a ram-air outlet. The system also includes a heat exchanger configured to exchange heat with air within the ram-air duct, an auxiliary air passageway and an electrically-driven air mover configured to move a flow of auxiliary air along the auxiliary air p...