Cutting-edge inventions vying for Lepine competition's top prize A firefighting drone, a 4x4 electric scooter, a women's urinal and a "connected" lifejacket are just some of the inventions vying for the top prize in the 118th edition of the Lepine competition, held at at the Paris Fair. More than 500 inventors were vying for the prize, to be announced on May 7.