Nike v. Lululemon — Federal Circuit Upholds Invalidation of Fitness-Watch Patent Claims

Background

Nike owned U.S. Patent No. 8,620,413, which covers a portable electronic console—such as a fitness watch—that can receive information from sensors and guide a user through exercise. The challenged claims described prompting a user to exercise at successive exertion levels, determining heart-rate zones from sensor measurements, and later checking whether the user remained within a selected zone.

Lululemon challenged claims 1–5, 7, 9, 12–14, and 17–19 in inter partes review, a Patent Trial and Appeal Board proceeding used to test patent validity against earlier publications and patents. The PTAB found some claims anticipated by the Amano patent and the remaining claims obvious over Amano combined with the Gorman or Flach references. Nike appealed.

The Court’s Holding

The Federal Circuit affirmed the PTAB’s final written decision in full. Writing for a unanimous panel in a nonprecedential opinion, Chief District Judge Cathy Bissoon concluded that Nike’s arguments did not justify disturbing the Board’s factual findings or its interpretation of the claims.

Nike argued that the claim phrase “based on a level of physical fitness of a user” required more than the physical characteristics disclosed in Amano. The court disagreed. The claim used broad language, and the patent specification did not meaningfully restrict which characteristics could be used to assess fitness. Amano’s use of stride length and body weight, considered together when increasing exercise intensity, therefore supplied substantial evidence for the Board’s anticipation finding.

The court also rejected Nike’s contention that the Board improperly stitched together separate Amano embodiments. The later embodiments expressly incorporated earlier methods, and the Board permissibly credited expert testimony that a skilled artisan would understand the disclosure as a coherent whole. Finally, expert evidence supported the Board’s findings that an ordinarily skilled artisan would have been motivated to combine Amano with Gorman and Flach for the dependent claims.

Key Takeaways

• Broad functional language can leave a patent claim exposed to prior art when the specification does not define meaningful limits.
• A prior-art reference may anticipate a claim using features described across related embodiments when the reference teaches their combination and a skilled artisan could implement it.
• On appeal from the PTAB, credibility choices and fact findings supported by substantial evidence are difficult to overturn.
• The decision is nonprecedential, but it illustrates how claim drafting and specification detail affect later validity challenges.

Why It Matters

The ruling leaves all challenged claims of Nike’s fitness-watch patent unpatentable. For wearable-device companies, it underscores that familiar sensor inputs and exercise metrics may count as claim-satisfying features when patent language is drafted broadly.

Patent applicants can reduce that risk by explaining what claimed concepts mean, which inputs qualify, and how the invention differs technically from earlier systems. Patent challengers, meanwhile, benefit from connecting the prior art’s disclosures with expert testimony that explains how a skilled reader would understand related embodiments.