In the case of Federal Trade Commission v. Eastman Kodak Company et al., 1926, the U.S Supreme Court ruled in favor of Eastman Kodak Company. The Federal Trade Commission (FTC) had accused Eastman Kodak of violating antitrust laws by engaging in unfair methods of competition through its policy on selling photographic supplies and equipment to dealers who also sold rival products. However, the court found that this practice did not constitute an unfair method as it was a reasonable business strategy for maintaining quality control over their products and protecting their reputation from being associated with inferior goods. Furthermore, there was no evidence showing that this policy substantially lessened competition or created a monopoly within the market for photographic supplies and equipment.

In the dissenting opinion for Federal Trade Commission v. Eastman Kodak Company, Justice Stone argued that the majority's decision to uphold FTC's order against Eastman Kodak was flawed. He believed that there was insufficient evidence to prove that Kodak had engaged in unfair methods of competition by selling its film at lower prices abroad than domestically. According to him, it is not illegal per se for a company to sell its products cheaper in one market compared with another; such pricing strategies could be influenced by various legitimate factors including differences in costs and competitive conditions between markets. Moreover, he contended that FTC failed to demonstrate how this practice harmed other competitors or impeded competition overall - an essential requirement under Section 5 of the Federal Trade Commission Act which prohibits "unfair methods of competition". Therefore, he concluded that FTC’s order should have been set aside as it exceeded their statutory authority.