In April 1975, Fleer asked for Topps to waive its exclusive rights and allow Fleer to produce stickers, stamps, or other small items featuring active baseball players. Topps refused, and Fleer then sued both Topps and the MLBPA to break the Topps monopoly. After several years of litigation, the court ordered the union to offer group licenses for baseball cards to companies other than Topps. Fleer and another company, Donruss, were thus allowed to begin making cards in 1981. Fleer's legal victory was overturned after one season, but they continued to manufacture cards, substituting stickers with team logos for gum. Donruss distributed their cards with a Jigsaw puzzle piece.