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Federal Circuit Holds Prior-Art Reference Need Not Address Patentee’s Specific Stated Problem To Qualify As Analogous Art
09/01/2026On August 14, 2026, the U.S. Court of Appeals for the Federal Circuit affirmed the Patent Trial and Appeal Board’s final written decision in The Nielsen Company (US), LLC v. TVision Insights, Inc., No. 2025-1371 (Fed. Cir. Aug. 14, 2026), finding claims of U.S. Patent No. 11,470,243 unpatentable as obvious. The Federal Circuit held that a scientific publication concerning facial-expression analysis was reasonably pertinent analogous art to the claimed audience-measurement systems and rejected the patent owner’s argument that the Board violated the Administrative Procedure Act (“APA”) by relying on the “reasonably pertinent” prong of the analogous-art doctrine.
The patent at issue concerns audience-measurement systems that use images captured from a media-viewing environment to identify and analyze viewers. The challenged claims generally recite reducing the resolution of captured images and determining head orientation based on the resulting reduced-resolution images. According to the patent owner, the invention was directed to using lower-resolution images for certain audience-measurement functions while preserving higher-resolution images for facial recognition.
In the IPR, the petitioner relied in part on a publication by Ying-li Tian, entitled “Evaluation of Face Resolution for Expression Analysis.” The Tian reference examined how facial-analysis techniques performed when facial images were down-sampled to lower resolutions. The petitioner argued that Tian rendered the challenged claims obvious when combined with other prior-art references. The Board agreed and concluded that all challenged claims were unpatentable.
Turning to the legal issues on appeal, the Federal Circuit considered the doctrine of analogous art, which limits the prior art that may be considered in an obviousness analysis. A reference qualifies as analogous art if it is either (1) in the same field of endeavor as the invention or (2) reasonably pertinent to the particular problem confronting the inventor.
The patent owner argued that the Board violated the APA by considering Tian under the “reasonably pertinent” prong even though the petition allegedly relied only on the “same field of endeavor” test. The Federal Circuit rejected that argument for three independent reasons. First, the Court explained that the two analogous-art inquiries often overlap and that the evidence relied upon by the petitioner was relevant to both theories. Second, the Federal Circuit held that an analogous-art theory need not be stated expressly where the theory is implicit in the petition’s discussion of the claims, the prior art, and the reasons a skilled artisan would have combined the references. Third, the Court noted that the patent owner addressed both analogous-art prongs during the IPR and failed to identify any prejudice resulting from the Board’s analysis.
With the APA challenge resolved, the Federal Circuit turned to the merits of the reasonable-pertinence question. The Court found substantial evidence supported a finding that the patent was directed to problems in image processing and facial analysis. The claims recited analyzing images captured from a media environment, the patent title referenced image capture, and the specification discussed identifying individuals through facial recognition. Because Tian likewise addressed facial detection and analysis using lower-resolution images, the Federal Circuit held that the reference logically would have recommended itself to a person of ordinary skill seeking to solve those problems.
The decision reinforces that parties challenging patents may define the relevant problem at a level of generality supported by the claims and specification, rather than by the patent owner’s preferred characterization of the invention. It also underscores that courts evaluating analogous art will look beyond specific embodiments and implementation details to the broader technological objectives reflected in the claims. Where prior art addresses the same general technical problem, it may qualify as analogous art even if it originates from a different field.
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