ALEXANDRIA, Va., June 19 -- United States Patent no. 12,330,723, issued on June 17.

"Self-powered towable vehicle" was invented by Jason Mast (Crossville, Tenn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A self-powered towable vehicle has an energy interconnection and distribution unit configured for electrical communication with a power source and an onboard computer of a primary vehicle. A wheel member of the self-powered towable vehicle is selectively movable between an unpowered mode and a powered mode. In the unpowered mode, the wheel member is free rotating. In the powered mode, the wheel member is driven. The energy interconnection and distribution unit is also configured to coordinate movement be...