ALEXANDRIA, Va., March 5 -- United States Patent no. 12,241,425, issued on March 4, was assigned to Pratt & Whitney Canada Corp. (Longueuil, Canada).

"Hybrid electric propulsion system with start sequence and shutdown sequence" was invented by Yusuf Syed (Oakville, Canada), Thomas Trevor Ricci (Kirkland, Canada) and James Jarvo (Long Sault, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of and system for operating a hybrid electric propulsion system for an aircraft in a start sequence is provided. The hybrid electric propulsion system includes a thermal engine, an electric motor, a gearbox, an electric power storage unit, and a propulsion unit having a propeller having propeller blades. The m...