Enhancing Transparency in SEPs: The Sisvel–WIPO PATENTSCOPE Initiative

Transparency has become a cornerstone of a well-functioning standard-essential patent (SEP) ecosystem. Sisvel’s rates are routinely confirmed to be compliant with the Patent Owner’s FRAND obligations by courts; in one recent example, the Munich Regional Court’s 7th Civil Chamber in a case between Sisvel’s patent owner Wilus and Asus has confirmed Sisvel’s Wi-Fi 6 pool rates to be FRAND.  The company’s website serves as a central repository where stakeholders can access royalty structures, lists of licensors, and lists of patents that have been evaluated as essential by independent third-party evaluators.

On February 3, 2026, Sisvel took a significant step forward in advancing transparency through its collaboration with the World Intellectual Property Organization (WIPO). This initiative integrates verified SEP data into WIPO’s PATENTSCOPE platform, making it easier for users to access information about patents that have been identified as essential to the relevant standard through the mechanisms of Sisvel’s FRAND-based patent pools. While the underlying data has long been publicly available on Sisvel’s website for the relevant pool, the integration into PATENTSCOPE substantially enhances discoverability and usability by embedding this information within a widely used global patent search interface.

At the core of this initiative is essentiality verification. Typically, patent owners submit their patents, along with supporting materials such as claim charts mapping patent claims to relevant technical standards, to an independent evaluator. This evaluator conducts a review and develops a legal opinion as to whether the patent is essential to the standard [1]. Only patents that have received a positive essentiality opinion are included in published lists and, by extension, in the data available through PATENTSCOPE.

How Likely is Essential?

Whether a patent is essential cannot be determined with zero margin of error, even with unlimited time or computational resources. For that reason, the better framework is probabilistic rather than absolute: verification does not eliminate uncertainty but materially increases the likelihood that the patent family is in fact essential.

Put differently, it is uncontroversial that an independently verified patent carries a substantially higher probability of true essentiality than one that has merely been declared potentially essential by a patent owner at a standard development organization (SDO). In simplified terms:

where

p_D: Probability that a declared patent is essential

p_CC: Probability that a claim-charted patent is essential

p_V:  Probability that a verified patent is essential

A comprehensive probabilistic approach to essentiality and validity is examined more fully in a this journal article.

The policy significance is straightforward: PATENTSCOPE is not merely displaying “more patents”; it is revealing a subset of patents with a materially higher probability of actual essentiality than raw declaration data alone.

This distinction also matters at the portfolio level. As discussed in the previously referenced journal article, the probability that a portfolio contains at least one truly essential patent rises very quickly when the portfolio is composed of verified or rigorously claim-charted families. That is not true, or at least not true to the same degree, for portfolios made up of patents that were merely declared [2] as potentially essential. The practical consequence is that verification improves not only the informational quality of each listed family, but also the reliability of the portfolio-level signal conveyed to implementers, courts, regulators, and other market participants.

Considerations for Essentiality Assessments

Practical realities mean that not all essential patents can be subjected to this verification process. Certain constraints necessitate a degree of selectivity. For example, evaluations often focus on patents granted in selected jurisdictions that have substantial examination. For patents in other jurisdictions, Sisvel may rely on different mechanisms, one example of which is a process known as “vouching.” Under this approach, the patent owner represents that the scope of the claims of the local patent is substantially identical to that of a corresponding patent family member that has already been independently evaluated. Where this condition is met, the patent is included in the list without a separate evaluation. We also note that a mechanism for participating patent owners to challenge the inclusion of a patent generally exists.

Cost considerations also play a significant role. Third-party essentiality assessments are resource-intensive, particularly for large patent portfolios or smaller entities with limited budgets. Sisvel must therefore strike a balance between maximizing transparency and managing the economic burden associated with verification. One mechanism used to incentivize patent owners to submit patents for evaluation is a system of “patent points,” which are used, alongside other factors, to allocate licensing revenues within the pool. In general terms, a greater number of validated patents tends to be associated with a larger share of the revenue distribution. More broadly, the final allocation depends on the application of a wide range of allocation factors set forth in the relevant program.

A further limitation arises from the inherent complexity of identifying all essential patents within a given portfolio. Patent owners may not have complete visibility into every SEP they hold, and conducting a comprehensive internal review can be impractical. Importantly, however, this does not undermine the value of a pool license. Sisvel licenses are deliberately structured to be comprehensive, covering all patents that are essential to a given standard and owned by participating licensors within a defined field of use—regardless of whether those patents have been specifically identified or evaluated. This ensures that licensees obtain full freedom to operate.

Accordingly, the published patent lists should be understood as exemplary rather than exhaustive. While Sisvel actively incentivizes patent owners to evaluate their patents, these lists are necessarily illustrative. In fact, patent owners with large portfolios, based on considerations like those shared above, may only evaluate a small subset of their portfolios. This limitation is explicitly acknowledged through disclaimers in PATENTSCOPE, which clarify the scope and nature of the data presented.

It is equally important to recognize that this level of transparency entails significant costs. Both Sisvel and its participating patent owners invest substantial resources in generating, verifying, and maintaining these datasets. Their efforts reflect a broader commitment to improving market clarity and reducing information asymmetries in SEP licensing.

Bad Behavior Creates Imbalance

At the same time, the effectiveness of this system depends on the behavior of market participants. Many licensees engage constructively and negotiate licenses in good faith, contributing to a balanced and efficient ecosystem. However, where entities refuse to take a license from a pool offering FRAND terms and supported by a critical mass of licensors and licensees, it creates a structural imbalance. Such hold-out behavior disadvantages compliant licensees, undermines patent owners’ legitimate returns, and ultimately distorts the functioning of the ecosystem.

Courts and policymakers should recognize the asymmetry created by this behavior. A transparent, FRAND-based pool that provides extensive verified information represents a good-faith market solution. Refusal to engage with such a framework should not be treated neutrally, as it imposes externalities on the broader system. Strengthening recognition of these dynamics is essential to sustaining a fair and efficient SEP licensing environment.

Encouraging Solutions that Work

The Sisvel–WIPO collaboration through PATENTSCOPE illustrates how industry-led solutions can move beyond abstract calls for transparency to deliver it in practice. By embedding patent pool data into a widely used global platform, this initiative demonstrates that, with the support of institutions such as WIPO, the SEP ecosystem can evolve through concrete, market-based solutions rather than regulation.

Endnotes

[1] Looking ahead, advances in artificial intelligence may have an impact on the way SEP essentiality assessments are carried out. While such tools are not yet a substitute for expert legal and technical judgment, their rapid development suggests that essentiality verification could become increasingly scalable, consistent, and cost-efficient over time.

[2] According to their patent policies, SDOs encourage participating members to make timely disclosures of patents or patent applications that may be or become essential to standards under development. In practice, this means that disclosures are often made while specifications are still evolving, or—particularly in the case of applications—before claims have been finalized. As a result, there is an inherent trade-off between timeliness and accuracy: declarations cannot reliably establish essentiality, but rather only serve as an early signal that the patent holder is willing to license on FRAND terms any patents that ultimately prove to be essential.

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