In the 1942 case United States v. Wayne Pump Co., the Supreme Court of the United States addressed an issue related to antitrust laws and patent rights. The government accused several gasoline pump manufacturers, including Wayne Pump Company, of violating antitrust laws by conspiring to fix prices and control market shares through a cross-licensing agreement that involved sharing patented technology among themselves. The defendants argued that their actions were protected under patent law which grants exclusive rights to inventors for a certain period of time. However, the court ruled in favor of the government stating that while patents grant exclusive rights over inventions, they do not permit monopolistic practices or price-fixing schemes prohibited by antitrust legislation. Therefore, even though these companies held valid patents on their products, they could still be found guilty if they used those patents as part of an illegal conspiracy against competition.

In the dissenting opinion for United States v. Wayne Pump Co., it was argued that the majority's decision to uphold a conviction under the Sherman Act was incorrect due to an overly broad interpretation of what constitutes "restraint of trade." The dissenting justices believed that not all agreements among businesses should be considered illegal, especially if they do not result in monopolistic practices or harm competition. They contended that such an expansive view could potentially criminalize normal business activities and arrangements which are essential for economic growth and development. Furthermore, they expressed concerns about potential abuses of prosecutorial discretion resulting from this wide-ranging interpretation of antitrust laws.