Epic Tech v. Pen-Tech — Court Must Revisit Sanctions Over Patent-Validity Warning Signs

Background

Epic Tech sued Pen-Tech over a patent covering networked electronic sweepstakes games. The district court later found the asserted claims ineligible for patent protection under 35 U.S.C. § 101. Pen-Tech then sought sanctions and attorney fees, arguing that Epic Tech and its counsel should have investigated validity before suing.

Pen-Tech pointed to several warning signs: the Supreme Court’s Alice decision on software-patent eligibility, Patent Office rejections of claims in three related applications, and a separate ruling invalidating claims in a related patent. The district court denied relief, emphasizing Epic Tech’s pre-suit infringement investigation and the patent’s presumption of validity.

The Court’s Holding

The Federal Circuit vacated the denial of Rule 11 sanctions and attorney fees and remanded for a fuller explanation. It did not decide that Epic Tech or its lawyers deserved sanctions. Instead, it held that the district court’s reasoning was too thin to permit meaningful appellate review of Pen-Tech’s distinct theory that Epic Tech had notice of serious validity problems before filing suit.

An infringement claim chart may show that counsel investigated whether an accused product practices the patent, the court explained, but it does not answer whether counsel reasonably investigated patent eligibility. Taken together, Alice, the Patent Office’s eligibility rejections of related claims, and the related-patent judgment created a compelling validity concern that the district court needed to confront directly.

The same defect affected the denials of fees under 35 U.S.C. § 285, 28 U.S.C. § 1927, and the court’s inherent authority. The Federal Circuit required an explanation adequate to show why the asserted case remained reasonable despite the identified warning signs.

Key Takeaways

• A pre-suit infringement analysis does not substitute for investigating known validity risks.
• Related Patent Office rejections and court decisions can put a patent owner on notice even when they do not involve exactly identical claims.
• The ruling does not establish automatic sanctions; it requires trial courts to explain how they evaluated a concrete validity-notice theory.

Why It Matters

The decision raises the practical importance of documenting both infringement and validity diligence before filing a patent case. Owners of software patents cannot rely on the statutory presumption of validity alone when the prosecution history and related litigation signal a substantial eligibility problem.

For accused infringers, the opinion provides a framework for sanctions and fee requests grounded in what the patent owner knew before suit. For patent counsel, it is a reminder that a defensible filing record should address adverse signals, not merely confirm that the accused product maps onto claim language.