Lu v. Hyper Bicycles — Federal Circuit Affirms Attorney Fee Award After Frivolous Patent Suit

Background

In September 2020, Fa-Hsing Lu filed a patent infringement suit against Hyper Bicycles, Inc. in the District of Massachusetts. Three years later, summary judgment was entered in Hyper’s favor, and the Federal Circuit affirmed that decision in February 2025.

Hyper then moved for attorney fees under 35 U.S.C. § 285, which allows courts to award fees to the prevailing party in “exceptional” patent cases. The district court (Judge Gorton) agreed, finding that Lu “did not prosecute his claim in good faith and made little effort to limit the costs incurred by dragging it out.” The court pointed to a striking pattern: over three years of litigation, Lu made four requests for discovery extensions yet never propounded any written discovery, took any depositions, or named any expert witnesses. His summary judgment briefing was “cursory,” and he failed to submit any statement of disputed facts. Most damning, his own discovery responses revealed he had no knowledge of whether any infringing products were actually sold.

The district court awarded Hyper its attorney fees and costs from January 3, 2022 — the date by which Lu’s counsel “should have known” the claims were meritless — forward.

The Court’s Holding

The Federal Circuit affirmed in a short, unanimous opinion by Judge Hughes. Applying the abuse-of-discretion standard from Highmark Inc. v. Allcare Health Management Systems and the Octane Fitness framework, the court found no error in the district court’s exceptional-case determination.

The court emphasized that the district court “lives with the case over a prolonged period of time” and is best positioned to evaluate whether litigation conduct crosses the line into the exceptional. Here, the factual record — years of stalling without conducting any meaningful discovery, cursory briefing, and a complete absence of evidence of infringement — amply supported the finding.

The court declined to consider arguments Lu raised for the first time in his reply brief, citing the established rule that such arguments are not properly before the appellate court.

Key Takeaways

• Filing a patent suit without evidence of infringement and then stalling for years will trigger fee-shifting. Courts take seriously the requirement that patent plaintiffs have a good-faith basis for their claims and prosecute them diligently.
• The abuse-of-discretion standard gives district courts wide latitude on § 285 determinations. Appellate reversal of exceptional-case findings remains rare, especially when supported by a clear record of litigation misconduct.
• Discovery conduct matters for fee awards. Requesting multiple extensions without ever actually conducting discovery is a strong signal that a case lacks merit and was not prosecuted in good faith.

Why It Matters

This decision is a cautionary tale for patent plaintiffs who file suit without adequate pre-filing investigation and then let cases languish. The Octane Fitness standard, now over a decade old, continues to be a potent tool for defendants to recover fees when patent claims are brought or maintained frivolously. For businesses facing questionable patent assertions, this case reinforces that vigorous fee petitions can succeed — and that courts will look at the entire litigation history, not just the final merits ruling, when deciding whether a case is exceptional.