ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,174, issued on Sept. 30.
"Hybrid systems for drones and other modes of transport" was invented by Lars Harald Heggen (Drammen, Norway).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hybrid system for drones and other modes of transport. A combustion engine provides range and/or lifting capacity for drones while electric motors/generators provide both control and maneuverability. One or more combustion engines, in conjunction with one or more electric motors/generators form a propulsion system whereby each is connected to and drives its own driving pinion in one or more planetary gear sets, and provide continuously variable transmission for driving...