Background
MercExchange, L.L.C. held patents covering technology for conducting electronic commerce — specifically, a system enabling individuals to post goods for sale at fixed prices over the internet. eBay’s “Buy It Now” feature, which allowed buyers to instantly purchase auction listings at a set price, was found by a jury to infringe MercExchange’s patents. The jury awarded approximately $35 million in damages.
After the jury verdict, MercExchange moved for a permanent injunction barring eBay and its subsidiary Half.com from operating the infringing features. The district court denied the injunction, citing several factors: MercExchange had not commercialized its patents, was willing to license them, and sought injunctive relief primarily as a bargaining tool. The district court also noted public interest considerations given the widespread use of eBay’s platform. eBay cross-appealed on invalidity; MercExchange appealed the denial of the injunction.
The case arrived at the Federal Circuit at a time when the court had developed a near-automatic rule: upon a finding of patent infringement, courts should issue permanent injunctions except in exceptional circumstances. The question was whether the district court’s denial fell within those narrow exceptions.
The Court’s Holding
The Federal Circuit reversed the denial of the permanent injunction and ordered the district court to issue one. Applying the court’s established general rule, Judge Bryson’s opinion held that “the right to exclude recognized in a patent is but the essence of the concept of property” and that courts should issue permanent injunctions against patent infringement unless there are exceptional circumstances such as a case involving public health or a case where an infringer is a governmental entity.
The court found no such exceptional circumstances here. The fact that MercExchange had not practiced its patents and was in the business of licensing them did not, by itself, constitute an exceptional circumstance. The district court had improperly weighed factors such as MercExchange’s licensing posture and the public’s interest in eBay’s continued operation. Under the Federal Circuit’s general rule, a patentee’s right to an injunction was nearly absolute.
This ruling set the stage for a landmark Supreme Court review. The Supreme Court granted certiorari and in May 2006 unanimously reversed the Federal Circuit, holding that courts must apply the traditional four-factor equitable test for injunctions in patent cases — the same test used in other areas of law — rather than any general rule favoring or disfavoring injunctions.
Key Takeaways
- The Federal Circuit’s prior rule treated permanent injunctions in patent cases as nearly automatic upon a finding of infringement.
- Under the Federal Circuit’s approach, a patentee’s failure to practice its patents or its status as a licensing entity did not constitute exceptional circumstances defeating injunctive relief.
- The Federal Circuit’s “general rule” was unanimously rejected by the Supreme Court in eBay Inc. v. MercExchange (2006), which held that the traditional four-factor equitable test applies to patent injunctions.
- This case was a catalyst for the Supreme Court’s most important patent procedure ruling of the 2000s, fundamentally changing the injunction landscape.
- After eBay (SCOTUS), non-practicing entities (patent licensing companies) became much less likely to obtain injunctions, transforming patent litigation strategy.
Why It Matters
The Federal Circuit’s eBay decision illustrates a pivotal moment in patent law history — the high point of a strong-patentee era in which patent rights were treated as near-absolute property rights commanding near-automatic injunctions. By articulating and applying the general-rule approach, the Federal Circuit set up the Supreme Court’s correction, which proved to be one of the most consequential patent law decisions in decades.
After the Supreme Court’s reversal in eBay v. MercExchange (2006), the entire balance of patent litigation shifted. Non-practicing entities — companies that hold patents without making products — found it dramatically harder to obtain injunctions, which reduced their leverage in licensing negotiations. The transformation led to fundamental changes in how companies valued and litigated patents, and accelerated the growth of royalty-based rather than injunction-based patent enforcement. This Federal Circuit decision, by being overruled, was paradoxically one of the most influential patent law opinions of the decade.