No Trade Mark Protection for “420”: Why Scene Terms Can Fail as Trade Marks
A term (in legal terms, a so-called “sign”) can work very well in advertising because everyone understands it, yet be unsuitable as a brand name for precisely that reason, because the target group knows it particularly well. This is exactly what the failed trade mark application for the sign “420” shows: the Federal Patent Court (BPatG) has refused this number sequence protection as a word mark for cannabis products because the relevant public understands it as an established reference to cannabis – and not as an indication of a particular business.
The apparent paradox is that a “scene term” initially sounds like limited, group-specific familiarity, whereas the trade mark law argument turns precisely on this familiarity. How can it be familiarity within the scene, of all things, that leads to trade mark protection being denied to the term?
The answer lies in the function of a trade mark: it must not merely be well known or effective in advertising, but must enable the customers addressed to attribute the goods to a particular business. Where, by contrast, a sign is understood only as a generally comprehensible term, code or factual reference, it may lack precisely this function of indicating origin. It is therefore not familiarity as such that is the problem, but what the relevant public recognises in the sign – a trade mark, or merely a reference to a product, a topic or a scene.
It is irrelevant here whether this familiarity exists only within a particular scene. For the assessment under trade mark law, it can be sufficient that the term is familiar to the relevant public and is understood by them not as an indication of origin but merely in its factual or scene-typical meaning.
The “420” case may look like a footnote from the growing cannabis market. The question behind it, however, affects trade mark applications in almost all trend-driven and scene-driven markets such as gaming, crypto, streetwear, fitness or music.
What the Case Was About
“420” is an established code among cannabis consumers worldwide, relating to cannabis and cannabis consumption. A company wanted to have precisely this number sequence protected as a word mark for a broad range of cannabis products and services, in particular from the pharmaceutical and cannabis-related sectors.
The German Patent and Trade Mark Office (DPMA) refused registration for around 300 categories of goods and services. The BPatG confirmed this refusal by decision of 2 July 2026 (25 W (pat) 535/23).
The Grounds for the Decision
The decisive point: “420” is not understood by the relevant public as an individual indication of a particular business. The number sequence is rather already occupied by a fixed factual meaning and is perceived as a reference to cannabis or cannabis consumption. The sign therefore lacked the required distinctive character.
Distinctive Character as a Prerequisite for Trade Mark Protection
A trade mark needs distinctive character because this is where one of its central functions lies: it is meant to enable the relevant public to attribute goods or services to a particular business and to distinguish them from the offers of other businesses. In legal terms, this is referred to as the origin function of the trade mark.
Where a sign lacks this suitability, its registration is precluded by the absolute ground for refusal of lack of distinctive character under § 8 para. 2 no. 1 MarkenG. This is precisely where a trade mark application can fail if a sign is understood by the relevant public, on account of its established factual meaning, merely as a factual reference and not as an indication of commercial origin.
That was the case with “420” in the view of the BPatG: the public understands the number sequence as an established factual and scene reference relating to cannabis, and therefore as a statement about the goods or their thematic context, rather than attributing it to a particular business. Put simply: anyone who reads “420” thinks of cannabis – not of a particular supplier.
These two objections raised by the applicant against the refusal, in favour of trade mark protection, did not succeed:
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Only professional circles are said to be addressed: The applicant’s argument that only medical professionals were addressed and that the meaning of “420” was not familiar to them therefore failed on that ground alone. The BPatG was not convinced, because the list of goods and services also covered the general public. Irrespective of that, the BPatG assumed that the medical professional public also knows the code, and referred, among other things, to designations such as “420brokkoli” or “Remedium420” in the pharmacy sector. Even a narrower argument based on an exclusively expert audience would thus not have saved the application.
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An unclear history of origin does not mean an unclear meaning: A further objection concerned the origin of the expression “420”. Where it originally comes from has not been conclusively clarified historically. For the assessment under trade mark law, however, this played no decisive role in the BPatG’s view.
When it comes to distinctive character, what matters is not whether the history of a sign’s origin is clearly established, but what meaning the relevant public attributes to it today. And in the court’s view, this understanding was clearly tied to cannabis.
The unknown or disputed etymology of a sign therefore does not automatically make its present meaning unclear.
Failing on the Need to Keep Terms Free
In the case of terms with a clear factual meaning, several absolute grounds for refusal can coincide. In the “420” case, the lack of distinctive character under § 8 para. 2 no. 1 MarkenG was already sufficient for the refusal: the sign was not understood as an individual indication of origin.
In addition, descriptive indications often give rise to a second problem: such terms should in principle also remain available to competitors and not be monopolised by a single business. This is referred to as the need to keep free (Freihaltebedürfnis) under § 8 para. 2 no. 2 MarkenG.
In practice, the two ideas are often connected but are not identical:
- Lack of distinctive character: Customers do not understand the sign as a trade mark.
- Need to keep free: Competitors, too, should remain able to use certain descriptive indications.
In the case decided, the first point was already decisive.
Marketing Strength Is Not Trade Mark Strength
A term can be particularly strong, identity-forming and recognisable within a scene – and for precisely that reason cause difficulties as a trade mark. The more clearly a sign already stands for a particular thing or topic in the relevant target group, the harder it is to see in it, in addition, an indication of a single business.
The paradox can be resolved by a simple distinction: it is not familiarity as such that weakens a trade mark. It only becomes problematic when it is precisely the well-known meaning of the sign that leads the public to no longer see in it an indication of commercial origin. A well-known fanciful designation can be a very strong trade mark; a well-known descriptive term, scene code or common abbreviation, by contrast, cannot, if the target group understands it immediately in terms of its content.
A sign can therefore communicate excellently what it is about without communicating who it comes from. That is the difference between a term that works well in advertising and a protectable trade mark. The decisive question when choosing a sign is therefore not “Does my target group know the term?” but rather: does it recognise my trade mark in it – or only the meaning of the term?
The “OPENAI” case likewise shows that being well known does not in itself guarantee trade mark protection. There, too, what was decisive was not familiarity but how the sign is understood in connection with the specific goods and services claimed (on this, see our article “When Even an AI Giant Fails to Secure Trade Mark Protection”). The same basic problem can arise with terms from fields such as gaming, crypto, veganism, music or fitness.
Conclusion: The Perfect Marketing Term Is Not Automatically the Perfect Trade Mark
The “420” decision is more than a cannabis curiosity. It shows a fundamental difference between marketing and trade mark law: a term can be concise, well known and identity-forming for one’s own target group and nevertheless unsuitable as a trade mark. What matters is not how memorable the sign is but whether the customers addressed recognise in it an indication of a particular business.
The practical lesson is therefore not to avoid scene terms as a matter of principle, but to check early on whether the public sees in them an indication of a business at all – or merely a well-known term from the scene. Anyone who wants to build a brand in a trend-driven market should clarify whether the sign can be protected before substantial budgets flow into naming, branding, packaging or marketing.
A thorough trade mark search and setting the right course for the trade mark application are regularly cheaper than repairing a failed application after the fact.
Are you planning a trade mark application or have you received a refusal from the DPMA? We will review whether your sign can be protected and develop a sound strategy for filing or defence.
