ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,527, issued on Oct. 7.
"Battery powered hand-operated troweling machine" was invented by Samuel K. Esh (Quarryville, Pa.) and David King (Paradise, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A battery-powered troweling machine is driven by an electric motor powered by a pair of twenty-four volt batteries coupled in series to drive a planetary gearbox to rotate a trowel blade assembly engageable with the surface of the poured concrete. The controls are carried by a detachable handle that is connectable with a receiver box that traps the handle between interior and exterior stops and uses over center clamps to maintain the handle in proper posi...