The New Case: Nielsen v. TVision
The Federal Circuit’s August 14, 2026 decision in The Nielsen Company (US), LLC v. TVision Insights, Inc. addressed a textbook analogous-art dispute. Nielsen’s U.S. Patent No. 11,470,243 concerns television audience measurement using cameras to capture viewer images and then perform people detection and identification. TVision relied on a scientific paper by Ying-li Tian titled Evaluation of Face Resolution for Expression Analysis, which studied how different image resolutions affect facial-expression analysis.
Nielsen argued that Tian was not analogous art. In Nielsen’s view, the patent and the paper were not in the same technical field, and Tian addressed a different problem. The Federal Circuit affirmed the PTAB and held that substantial evidence supported treating Tian as reasonably pertinent analogous art.
A reference does not have to come from the same industry or product category. If it is reasonably pertinent to a problem faced by the inventor, it can still enter the §103 analysis.
The Two Tests for Analogous Art
MPEP § 2141.01(a) states that a reference used in a §103 obviousness rejection must be analogous art. A reference qualifies if either of two independent tests is satisfied:
- it is from the same field of endeavor as the claimed invention, even if it addresses a different problem; or
- it is reasonably pertinent to the problem faced by the inventor, even if it is not in the same field of endeavor.
Only one test needs to be satisfied. That is why “Reference B is used in medical devices while this application concerns industrial equipment” can be a starting point, but not a complete nonanalogous-art argument.
The first test also cannot be reduced to industry labels. The USPTO looks to the subject matter, embodiments, function, and structure of the invention. Similarities and differences in structure and function generally matter more than whether two references happen to sit in different commercial sectors or patent classifications.
Why Nielsen’s Narrow Problem Definition Failed
Nielsen tried to define its problem narrowly. The specification discussed drawbacks of repeatedly activating an illumination source in audience-measurement systems, including power consumption, heat, shortened light-source life, and possible disturbance to viewers. Nielsen therefore argued that the invention’s problem was essentially reducing the use of illumination.
That framing made Tian look remote. Tian was about facial-expression analysis and image resolution, not television illumination.
But the challenged claims did not require an illumination source. They were broader: they required reducing image resolution and determining head orientation relative to a camera based on the reduced-resolution image. The Federal Circuit also emphasized that a patent may address more than one problem. The title, background, specification, and claims of the ’243 patent all dealt with image processing, face detection, and identification.
Tian, meanwhile, studied the effect of lower-resolution images on facial analysis, including head detection and pose estimation. The two documents therefore connected on a relevant technical question: whether lower-resolution images could still support facial detection and analysis. That was enough for the Board to find, and the Federal Circuit to affirm, that Tian would logically have commended itself to the attention of a skilled person addressing the claimed problem.
Broad Claims Can Broaden the Relevant Prior-Art Universe
Nielsen also illustrates a prosecution point that is easy to miss: the “problem faced by the inventor” cannot simply be defined at whatever level of specificity is most convenient in the response.
When the claim itself is broad, an applicant cannot necessarily rely on a narrow implementation problem from the specification to exclude art that is pertinent to what the claim actually covers. Under the KSR framework, obviousness analysis focuses on the objective scope of the claimed subject matter, not only on the inventor’s preferred articulation of the invention’s purpose.
In practice, the broader the independent claim, the larger the set of technical problems and prior-art teachings that may reasonably intersect with it. If application-specific constraints are left only in dependent claims, the examiner may not need to stay within the narrow field the applicant has in mind when searching for §103 references against the broader independent claim.
How to Respond to a Cross-Field §103 Combination
A better response should separate several questions instead of collapsing them into “different technical field.”
1. Address the field-of-endeavor test on technical facts
Compare structure, function, operating environment, implementation, and the technical subject matter that a skilled person would recognize—not merely industry names such as automotive, robotics, medical, or industrial.
2. Address reasonable pertinence separately
Even if the reference is outside the field of endeavor, ask whether the two technologies confront the same or a sufficiently similar problem. Would a person of ordinary skill, trying to solve the claimed problem, reasonably have looked to that reference? Is the cited technique actually directed to the kind of problem presented by the claim?
3. Challenge an overbroad problem formulation—but do not make it artificially narrow
If the Office Action describes the problem at such a high level that almost any reference appears pertinent, explain why that formulation strips away the real technical constraints shown by the claims and specification. At the same time, Nielsen warns that a problem definition cannot ignore the breadth of the challenged claim.
4. Keep analogous art separate from motivation to combine
Even if a reference qualifies as analogous art, the §103 analysis is not finished. The Office still must support why a skilled person would have used the particular teaching in the claimed combination. Technical compatibility, reason to combine, reasonable expectation of success, missing limitations, and teaching away may remain independent issues.
In Nielsen itself, the Federal Circuit separately addressed motivation to combine and affirmed the Board’s finding that reducing image resolution could save processing resources and time while Tian showed how facial detection could still work at reduced resolution.
The Takeaway
For Chinese applicants responding to U.S. Office Actions, “D1 is automotive while our invention is robotics” or “D2 is medical while our invention is industrial” may be intuitive, but those labels do not decide analogous art.
The stronger question is:
If the reference addresses a problem that is reasonably pertinent to what the claim and specification actually cover, a different application field may not keep it out of the §103 analysis.
Nielsen is a useful reminder that analogous art, motivation to combine, technical feasibility, and reasonable expectation of success are related but distinct layers. In a strong §103 response, those layers should be analyzed separately.