The Federal Circuit’s decision in Future Link Systems, LLC v. Realtek Semiconductor Corp., Nos. 2023-1056, 2023-1057 (Fed. Cir. Sept. 9, 2025), addresses a recurring but unsettled issue in patent litigation: when, exactly, a defendant becomes a “prevailing party” entitled to seek attorney fees and costs after a plaintiff voluntarily dismisses its case. The court’s answer is clear and consequential. When a district court converts a voluntary dismissal into a dismissal with prejudice as a sanction, that judicial act materially alters the legal relationship of the parties and confers prevailing-party status on the defendant for purposes of 35 U.S.C. § 285 and Federal Rule of Civil Procedure 54(d)(1).
The opinion also provides important guidance on the limits of Rule 11 sanctions, the high bar for fee-shifting under 28 U.S.C. § 1927, and the discretion afforded district courts in managing confidentiality and protective orders. Taken together, the decision offers a useful roadmap for litigants navigating post-dismissal fee disputes and sanctions motions.
Background of the Dispute
Future Link Systems filed two patent infringement actions against Realtek in the Western District of Texas. The first asserted U.S. Patent No. 7,917,680, and the second asserted U.S. Patent Nos. 8,099,614 and 7,685,439, all relating to integrated circuit technologies. Realtek challenged the suits on multiple grounds, including improper service, lack of personal jurisdiction, and failure to state a claim, and also moved for Rule 11 sanctions.
During discovery, Future Link produced a licensing agreement with MediaTek, a Realtek competitor. That agreement provided for a payment to Future Link if it filed suit against Realtek. Shortly thereafter, Future Link entered into a separate licensing agreement covering the accused Realtek products and then voluntarily dismissed both cases without prejudice.
Realtek responded by seeking attorney fees and costs under § 285 and Rule 54(d)(1), as well as sanctions under Rule 11, § 1927, and the court’s inherent authority. The district court denied most of the requested relief but, invoking its inherent power, converted the voluntary dismissals into dismissals with prejudice. Realtek appealed.
Prevailing Party Status Under § 285 and Rule 54(d)(1)
The central issue on appeal was whether Realtek qualified as a prevailing party. The district court had concluded that it did not, reasoning that Future Link’s voluntary dismissal and subsequent licensing agreement—not the court’s sanctions order—altered the parties’ legal relationship.
The Federal Circuit rejected that view. Applying de novo review, the panel emphasized that prevailing-party status turns on whether there has been a judicially sanctioned material alteration of the parties’ legal relationship. A dismissal with prejudice, regardless of how it arises, permanently bars the plaintiff from reasserting the same claims against the same defendant and accused products.
Relying on its own precedent and Supreme Court guidance, the court explained that a defendant need not obtain a merits judgment to prevail. It is enough that the defendant successfully rebuffs the plaintiff’s attempt to impose liability. Here, the district court’s sanction converting the dismissal to one with prejudice carried the necessary judicial imprimatur.
The Federal Circuit drew support from several prior decisions. In Highway Equipment Co. v. FECO, Ltd., the court held that a dismissal with prejudice following a covenant not to sue sufficed to establish prevailing-party status. In Raniere v. Microsoft Corp., a dismissal with prejudice for lack of standing was deemed tantamount to a merits judgment. More recently, United Cannabis Corp. v. Pure Hemp Collective Inc. confirmed that dismissal with prejudice by agreement still renders the defendant the prevailing party.
Applying those principles, the court concluded that Realtek was a prevailing party as a matter of law. The district court’s contrary conclusion was error. As a result, the Federal Circuit vacated the denial of § 285 fees and remanded for the district court to determine, in the first instance, whether the case was “exceptional” and whether fees should be awarded.
Charles Gideon Korrell believes this portion of the opinion is particularly important for defendants facing late-stage voluntary dismissals, as it reinforces that courts—not private settlements alone—control prevailing-party status when dismissals are entered with prejudice.
Costs Under Rule 54(d)(1)
The court also addressed Realtek’s request for costs. The district court had failed to address Rule 54(d)(1) at all. Under Fifth Circuit law, which governed review of the costs issue, there is a strong presumption that a prevailing party is entitled to costs, and a district court must articulate reasons for denying them.
Because Realtek was a prevailing party and the district court offered no explanation for denying costs, the Federal Circuit held that the omission constituted an abuse of discretion. The issue was remanded with instructions for the district court to consider costs and explain its decision.
Rule 11 Sanctions
Realtek also argued that Future Link’s suits were objectively baseless and brought for an improper purpose, warranting Rule 11 sanctions. The Federal Circuit affirmed the district court’s denial of sanctions, applying the deferential abuse-of-discretion standard.
The court emphasized that Rule 11 requires a reasonable pre-filing investigation, not a perfect one. In patent cases, that generally means interpreting the claims and comparing them to the accused products. Testing of accused products is not invariably required. The district court found that Future Link’s counsel conducted a sufficient investigation by analyzing publicly available technical documentation and preparing detailed claim charts.
On improper purpose, the court reiterated that motive alone is insufficient. Even if a plaintiff has a questionable incentive, sanctions are inappropriate if there is a plausible legal and factual basis for the claims. The district court credited Future Link’s explanation and noted that a third party had entered into a non-frivolous settlement, supporting the conclusion that the claims were not objectively baseless.
Charles Gideon Korrell notes that this aspect of the decision underscores how difficult it remains to obtain Rule 11 sanctions in patent cases absent clear evidence of frivolousness or bad faith.
Fees Under 28 U.S.C. § 1927
The Federal Circuit likewise affirmed the denial of fees under § 1927. That statute requires clear and convincing evidence that counsel unreasonably and vexatiously multiplied proceedings, a standard higher than Rule 11. The district court found no such conduct, and the appellate panel agreed that the record did not support a finding of bad faith or recklessness.
The court reiterated that § 1927 sanctions are to be applied sparingly, and disagreement over litigation strategy or ultimate merit is not enough.
Discovery and Confidentiality Issues
Finally, the court addressed Realtek’s challenges to certain confidentiality and protective-order rulings. Most had become moot, but one remained live: whether the district court abused its discretion by requiring outside counsel to enter appearances and agree to the protective order before accessing confidential materials.
Applying Fifth Circuit law, the Federal Circuit held that the district court acted well within its discretion. Ensuring that the court knows who has access to sensitive materials and can enforce compliance with protective orders constitutes good cause. Realtek’s preference for flexibility in selecting consulting counsel did not outweigh those concerns.
Takeaways
The most significant lesson from Future Link is procedural rather than substantive. A dismissal with prejudice—whether entered initially or imposed later as a sanction—carries powerful consequences. It not only bars future litigation but also opens the door to fee and cost recovery by conferring prevailing-party status.
For plaintiffs, the case is a reminder that voluntary dismissal does not always end exposure to fees, especially where a court intervenes. For defendants, it provides a clearer path to fees and costs when litigation ends with prejudice, even absent a merits judgment.
Charles Gideon Korrell believes the decision will encourage more rigorous consideration of post-dismissal strategy on both sides of the “v.”, particularly in cases involving licensing dynamics and competitive relationships.