Injunctions in Patent Litigation: What It Means to Be Ordered Off the Market

When a patent owner wins an infringement case, money damages are not the only remedy available. A court can also order the losing party to stop making, selling, or importing the infringing product entirely. That order is called a permanent injunction, and for a company whose core product is at stake, it can be more devastating than any damages award.

What an Injunction Actually Is

An injunction in patent litigation is a court order prohibiting specific conduct — typically continued manufacture, use, sale, offer for sale, or importation of a product or process the court has found to infringe a valid patent. Injunctions come in two forms.

Preliminary injunctions are sought early in litigation, before trial. The party asking for one must show, among other things, that it is likely to win on the merits, that it will suffer irreparable harm without the order, that the balance of hardships favors the injunction, and that the public interest supports it. Courts grant preliminary injunctions in patent cases infrequently, because the merits are often genuinely contested at that stage.

Permanent injunctions are requested after a final judgment of infringement. Even then, they are not automatic. Following the U.S. Supreme Court's 2006 decision in eBay Inc. v. MercExchange, L.L.C., courts must apply the same four-factor equitable test rather than presume that a prevailing patent owner automatically gets an injunction. In practice, companies that directly compete with the infringer tend to obtain permanent injunctions more readily than patent holders who are not practicing the invention themselves.

The Four-Factor Test Courts Apply

Every injunction request — preliminary or permanent — runs through equity. Courts look at:

• Irreparable harm. Can the plaintiff's injury be adequately compensated with money? Lost market share, price erosion, and damage to reputation are the kinds of harms patent owners argue cannot be fully repaired with a check.
• Adequacy of monetary damages. If ongoing royalties would make the patent owner whole, a court may decline to issue an injunction and instead set a compulsory license rate.
• Balance of hardships. How burdensome is the injunction on the defendant compared to how burdensome its absence is on the plaintiff? A startup whose entire product would be shut down may have a stronger hardship argument than a large company with many product lines.
• Public interest. Courts weigh whether enjoining a product would harm consumers, disrupt supply chains, or restrict access to important technology. This factor has mattered in cases involving medical devices and essential communications infrastructure.

No single factor is automatically decisive. Courts weigh them together.

What Happens After an Injunction Issues

If a permanent injunction is entered, the defendant typically has a compliance deadline — often 30 to 90 days — to stop the enjoined conduct. What companies actually do during that window varies:

Design Around

The defendant modifies the product to avoid the claims the court found infringed. This requires careful analysis, because a design-around that still falls within the patent's scope will violate the injunction and can result in contempt proceedings.

Negotiate a License

An injunction creates significant settlement pressure. Many cases that reach this stage resolve with a licensing agreement that allows the defendant to continue operating in exchange for royalties.

Appeal

A party can seek a stay of the injunction pending appeal. Courts evaluate stay requests using factors similar to the injunction test itself. A stay is not guaranteed, and litigation continues during appeal.

Accept the Shutdown

In some cases — particularly where the infringing feature is incidental to a larger product — a company may simply remove the feature rather than litigate further.

Injunctions and Non-Practicing Entities

Companies that license patents but do not make products — sometimes called non-practicing entities or patent assertion entities — face a harder path to injunctive relief under the eBay framework. Because they do not sell competing products, they often struggle to show irreparable market harm. Courts in these situations frequently award ongoing royalties instead, effectively setting a compulsory licensing rate rather than shutting the defendant down. This does not mean injunctions are unavailable to non-practicing entities, but the showing required is higher.

Practical Takeaways

• An injunction is not automatic even after a plaintiff wins a patent trial — courts apply a four-factor equitable test every time.
• Preliminary injunctions are hard to obtain in patent cases; most injunctive relief comes after final judgment.
• The eBay decision matters: competing companies tend to get injunctions more readily than entities that only license patents.
• If your product faces an injunction threat, design-around analysis and licensing negotiations are the two most common paths forward.
• Public interest and hardship arguments can meaningfully affect the outcome — they are not mere formalities.
• An injunction compliance deadline is real; violating a court order can result in contempt sanctions separate from the underlying patent dispute.

This guide is general education, not legal advice, and does not create an attorney–client relationship. For your specific situation, talk to a registered patent attorney.