In the United States v. Line Material Co. et al., 1947, the Supreme Court examined whether patent licensing agreements that set a fixed price for products using the patented technology violated antitrust laws. The case involved two companies, Line Material Company and Southern States Equipment Corporation, who held separate but complementary patents on electrical equipment. They had entered into an agreement to license their patents to other manufacturers at a specified minimum price per unit sold. The government argued this constituted illegal price-fixing under Section 1 of the Sherman Act - an act passed by Congress in 1890 to combat anti-competitive practices such as monopolies or cartels which restrict trade and competition. The court ruled in favor of the government stating that while patent holders have exclusive rights over their invention's use and sale, they cannot use those rights to artificially control market prices through collusive agreements with other patent holders; doing so would indeed violate antitrust law. This decision clarified how far-reaching intellectual property rights are when it comes to pricing goods or services related to patented inventions – essentially limiting potential abuses of these rights within competitive markets.

In the dissenting opinion for United States v. Line Material Co., Justice Jackson argued that the majority's decision to rule against patent holders' price-fixing agreements was a misinterpretation of both antitrust law and patent law. He contended that patents inherently grant monopolistic rights, including setting prices, and thus should not be subject to antitrust laws designed to prevent such behavior in competitive markets. Additionally, he believed that Congress had already addressed this issue by passing legislation allowing certain types of price-fixing among patent holders under specific conditions. Therefore, he felt it was inappropriate for the Court to intervene further on this matter without clear legislative direction from Congress.