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lawsuitdamagesprecedentinjunctionappealtestimonywillpatent
injunctionwillpatent

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Acumed LLC v. Stryker Corp., 483 F.3d 800, 82 U.S.P.Q.2d 1481

Facts

Acumed LLC, the assignee of U.S. Patent No. 5,472,444, which pertains to an orthopedic nail for treating humeral fractures, initiated a lawsuit against Stryker Corp. and its affiliates for patent infringement. The jury found that Stryker's product infringed Acumed's patent and that the infringement was willful. The district court awarded enhanced damages and issued a permanent injunction against Stryker, which subsequently appealed the decision.

Acumed is the assignee of the _444 patent, which is directed to an orthopedic nail for the treatment of fractures in the humerus (the upper arm bone which ends in the shoulder ball at top and the elbow joint at the bottom).

Issue

Did Stryker willfully infringe Acumed's patent, and was the district court's issuance of a permanent injunction appropriate?

Whether infringement of a patent is willful is a factual question that must be proven by clear and convincing evidence.

Rule

To establish patent infringement, the court must first interpret the claims of the patent and then compare the accused product to those claims. A finding of willful infringement requires clear and convincing evidence that the infringer acted with knowledge of the patent and its infringement. The court also reviews the jury's findings for substantial evidence.

A finding of patent infringement requires a two-step process: first, the court determines the meaning of the disputed claim terms, then the accused device is compared to the claims as construed to determine infringement.

Analysis

The court analyzed the jury's findings regarding the terms 'curved shank' and 'transverse holes' in the context of the patent claims. It determined that the jury's interpretation of these terms was supported by substantial evidence, including expert testimony. The court also noted that Stryker's actions, including disregarding legal advice and continuing to market the infringing product, supported the finding of willfulness. The court concluded that the district court did not abuse its discretion in issuing a permanent injunction.

The presence of a dependent claim that adds a particular limitation raises a presumption that the limitation in question is not found in the independent patent claim; that presumption is especially strong when the limitation in dispute is the only meaningful difference between an independent and dependent claim, and one party is urging that the limitation in the dependent claim should be read into the independent claim.

Conclusion

The Court of Appeals affirmed the jury's findings of infringement and willfulness but vacated the permanent injunction, remanding the case for reconsideration in light of recent Supreme Court precedent.

We affirm the district court's findings of infringement and willfulness, but vacate the permanent injunction issued against Stryker and remand for reconsideration in light of the Supreme Court's decision in eBay Inc. v. MercExchange, LLC, 547 U.S. 388, 126 S.Ct. 1837, 164 L.Ed.2d 641 (2006).

Who won?

Acumed LLC prevailed in the case, as the jury found Stryker liable for willful infringement of its patent. The court upheld the jury's findings, emphasizing that substantial evidence supported the conclusions regarding both infringement and willfulness. Acumed's ability to demonstrate that Stryker ignored legal advice and continued to market the infringing product was pivotal in establishing willfulness.

Acumed LLC prevailed in the case, as the jury found Stryker liable for willful infringement of its patent. The court upheld the jury's findings, emphasizing that substantial evidence supported the conclusions regarding both infringement and willfulness.

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