Background
TVision petitioned for inter partes review of Nielsen’s U.S. Patent No. 11,470,243, which concerns audience-measurement systems that capture images of viewers. The challenged dependent claims require reducing the resolution of an image and determining a person’s head orientation from the reduced-resolution image; two claims also require generating and comparing facial signatures.
The Patent Trial and Appeal Board held the challenged claims obvious over two prior-art combinations that included a scientific publication by Ying-li Tian on the effect of image resolution in facial-expression analysis. Nielsen had disclaimed the challenged independent claims before institution. On appeal, Nielsen argued that Tian was not analogous art, that the Board violated the APA by relying on a reasonably-pertinent-art theory, and that Tian and the combinations did not establish obviousness.
The Court’s Holding
The Federal Circuit affirmed. Substantial evidence supported the Board’s finding that Tian was reasonably pertinent analogous art because both Tian and the challenged patent address image processing, facial detection, and facial analysis. The relevant problem was not limited to the patent’s expressly stated concerns about illumination-source use; the claims and specification also supported the broader image-processing problem identified by the Board.
The court also rejected Nielsen’s APA argument. The reasonably-pertinent theory was implicit in TVision’s petition and overlapped with its same-field-of-endeavor evidence, Nielsen addressed both analogous-art prongs before the Board, and Nielsen identified no prejudice. The court further held that Tian’s down-sampling disclosed the claimed resolution reduction, that the claims did not require only a first image to be reduced or a second image to remain at full resolution, and that substantial evidence supported the Board’s motivation-to-combine findings.
Key Takeaways
- A patent may address multiple problems; analogous-art analysis is not confined to the specific problem expressly described in the specification.
- An analogous-art theory may be implicit in an IPR petition when the petition’s evidence and obviousness analysis place the issue in dispute.
- Claim language requiring reduced resolution does not, without more, limit the reduction technique to pixel binning or require a later image to be full resolution.
Why It Matters
The decision reinforces that the PTAB may identify a broader, claim-supported problem when assessing whether prior art is reasonably pertinent. It also emphasizes that APA notice challenges in IPR require a showing of prejudice.
For patent drafters and litigants, the case illustrates the importance of tying asserted claim limitations to express language: limitations concerning sequencing, exclusive use of a first image, or full-resolution later images will not be read into claims that do not state them.