AI Brands Still Off the Register: Class 42's AIaaS Slot Sits Largely Unfilled as UKIPO Sharpens Its Observation Lens

The Empty Slot Nobody Can Afford

Class 42 now has a dedicated home for the defining commercial product of our era. Since 1 January 2026, when the Nice Classification's 13th edition entered into force, 'Artificial Intelligence as a Service [AIaaS]' has been a formally recognised entry, covering AI infrastructure delivered via the internet or software platforms, from large-language-model access through to hosted inference services. Consultancy in artificial intelligence and research in artificial intelligence technology arrived alongside it, finally giving brand owners three distinct hooks in the class that most AI businesses inhabit.

And yet the sector is not using them.

Clarivate's Trademark Filing Trends Report 2026 found that, despite rapid commercial influence, most major AI companies did not feature among the highest trademark filers across major registers including the UKIPO, suggesting brand formalisation in the sector is still emerging. That absence is not merely an administrative oversight. It is a brand-protection gap that rivals, aggregators, and opportunistic third parties can and do exploit.

What Changed at the UKIPO This Week

The urgency sharpened on 30 July 2026, when the UK Intellectual Property Office updated its published guidance on third-party observations: the mechanism by which anyone can tell the IPO that an accepted application should not proceed to registration. The UKIPO had separately introduced a new dedicated form for such observations on 23 July 2026, adding it formally to the opposition and defence procedures in its trademark forms guide. The timeframes, volumes, and appeals section of the official GOV.UK guidance was updated days later.

The practical implication is quiet but pointed. Third-party observations are not a formal legal action (the IPO is not bound to act on them), but they are copied to the applicant and placed on the public file. For a brand that has allowed a competitor or a bad-faith filer to get an AI-service mark into the publication window, a sharpened observation process means more eyes on more applications, faster. That raises the stakes for anyone who has been slow to file.

Class 41: A Cooling Market with Hot Consequences

The picture in Class 41 deserves its own scrutiny. This is the class covering education, training, and entertainment, capturing AI-powered e-learning platforms, content academies, and skills programmes. According to AIBD analysis of IPO (TrademarkDashboard) data as of August 2026, UK Class 41 filings stand at 5,691 in Q3 2026, a fall of 32.9% against the prior period. That is a dramatic cooling for what is historically the third most-filed class on the UK register.

Two forces are likely at work. First, the April 2026 UKIPO fee increase, a roughly 25% rise taking the online filing fee to £205 for the first class and £60 for each additional class, has suppressed speculative and low-commitment filings. Second, the Nice 13 reclassifications have created genuine classification uncertainty: brand owners unsure whether an AI-powered learning product sits in Class 41 (education and entertainment services) or Class 42 (technology services and AIaaS) may be holding fire pending professional advice. That hesitation is rational. It is also costly if a competitor files first.

The structural split now built into the register compounds this. Marks filed before 1 January 2026 sit under old classification logic; marks filed after are classified under Nice 13. Clearance searches must now cover both generations, a point the Lexology analysis of the 13th edition flagged explicitly.

AI Brands and the Brexit Clone Deadline

There is a further pressure specific to UK portfolios. From 1 January 2026, owners of 'Brexit clone' trademarks, the comparable UK rights automatically derived from EU trademark registrations at the end of the transition period, must show genuine use in the UK to defend against non-use cancellation actions. Use in the EU prior to Brexit no longer counts. For AI companies that registered broad EU marks around 2019 to 2021 and assumed UK coverage followed passively, this is not a theoretical risk.

The bad-faith challenge environment is also elevated. World IP Review's UK Trademarks Rankings 2026 identified the rise of bad-faith challenges following the Supreme Court's Sky v SkyKick decision as a defining trend, alongside a post-Brexit rationalisation of the register. AI brands with vague or over-broad specifications, exactly the kind that rushed filings produce, are primary targets.

The Clarivate Paradox

So we arrive at a genuine paradox. The Nice 13 classification update is the most AI-friendly taxonomy reform in the system's history. AIaaS in Class 42 is precise, internationally recognised, and filing-ready. The UKIPO's observation mechanism is more accessible than ever. And yet Clarivate reports that e-commerce sellers, iGaming companies, and pharmaceutical brands are crowding the register while AI developers, whose valuations often rest almost entirely on brand and technology moat, are largely absent from the top-filer rankings.

Brand protection in AI is not optional infrastructure. It is the moat itself.

What to Do This Week

AI-sector brand owners should run an immediate audit across three fronts. Check whether existing Class 42 specifications use the new AIaaS terminology: older filings using generic 'computer services' or 'software as a service' language may not capture the new canonical term, leaving gaps a competitor can file into. Check Class 41 exposure for any learning, training, or entertainment product, because the cooling filing volume means the window to establish priority in this class, before the market re-accelerates, may be brief. Verify the use-position on any Brexit clone mark that has not been actively used in the UK since 2021.

For a first-pass audit of your UK trademark position across classes, TrademarkDashboard (trademarkdashboard.com) provides free register search and owner-view tools. For portfolio strategy and specification review under Nice 13, consult a registered trade mark attorney.