ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,510,249, issued on Dec. 30, was assigned to PRATT & WHITNEY CANADA CORP. (Longueuil, Canada).

"Auxiliary power unit with pulse detonation combustion" was invented by Daniel Alecu (Brampton, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "An accessory power unit assembly includes a combustor assembly that includes a pulse detonation tube that defines a curved passage between an inlet that receives a compressed airflow and a discharge end. The detonation tube operates as a resonant cavity to sustain a standing pressure wave. Fuel injected into the pulse detonation tube is timed to coincide with movement of a standing wave toward a discharge end. The...