ALEXANDRIA, Va., July 23 -- United States Patent no. 12,365,474, issued on July 22, was assigned to VerdeGo Aero Inc. (Daytona Beach, Fla.).

"Battery preheating systems and methods in an aircraft hybrid electric powertrain" was invented by Eric Richard Bartsch (Willmette, Ill.), Richard Pat Anderson (De Leon Springs, Fla.) and Xavier Gerardo Santacruz (Port Orange, Fla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A battery heating system for a hybrid aircraft powertrain includes a combustion engine, a battery pack, a combustion engine coolant circuit, and a battery pack coolant circuit. The battery heating system further includes a heat exchanger configured to exchange heat between the combustion engine c...