In 1930, Rochester manufacturer George Peo made a uniquely-designed trade stimulator, or counter game. These games prefigured later pinball machines and served to draw customers to a vendor who had one. Peo's design featured a then-revolutionary spiral design on its playfield, allowing the balls to spiral and then score. Peo's patents didn't protect him from competitors, who raced to incorporate the spiral design into their machines. The design survives today in certain games and even handheld bagatelles. A space theme marks such a game made in 1976.