How can antitrust laws limit companies that use patents to create monopolies?

Antitrust laws do not inherently prohibit the existence of a monopoly granted by a patent, as patents are intended to encourage innovation. Instead, these laws focus on preventing the abuse of a monopoly position.1

When a company uses its intellectual property rights to engage in practices that unfairly restrain trade or stifle competition, antitrust authorities intervene to protect the economy and consumers. Specifically, antitrust policy addresses:21

• Restrictive Practices: Companies may be penalized if they use their patent-protected status to engage in collusion, such as price-fixing or exclusionary agreements that prevent competitors from entering the market.21
• Abuse of Dominance: While holding a patent is legal, leveraging that patent to engage in predatory conduct—such as tying arrangements or blocking access to essential infrastructure—can be deemed an illegal restraint of trade.21
• Mergers and Acquisitions: Antitrust laws, such as the Clayton Antitrust Act, allow regulators to block mergers if the acquisition of patents or firms would substantially lessen competition.2

Ultimately, the goal is to ensure that intellectual property rights are not used to undermine the competitive markets necessary for innovation and growth.1