ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,264, issued on March 18, was assigned to PRATT & WHITNEY CANADA CORP. (Longueuil, Canada).

"Parallel control loops for hybrid electric aircraft" was invented by Leonid Guerchkovitch (Dollard-des-Ormeaux, Canada), Manuj Dhingra (Glastonbury, Conn.), Boris Karpman (Marlborough, Conn.) and Aaron J. Kaufman (Manchester, Conn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of controlling a hybrid-electric aircraft powerplant includes running a first control loop for command of a thermal engine based on error between total response commanded for a hybrid-electric powerplant and total response from the hybrid-electric powerplant. A second control...