Denmark is a small but wealthy EU market of around 6 million people, home to global names in shipping, pharmaceuticals, brewing, and design. But the most useful trademark lesson to come out of Denmark isn't about market size — it's a cautionary tale from Billund, where LEGO learned the hard way that even a globally iconic shape can lose trademark protection if a court decides its form is dictated by function rather than by brand identity.
LEGO's Brick-Shape Trademark Fight
LEGO attempted to register the shape of its basic brick — including the distinctive stud pattern on top — as a three-dimensional EU trademark, which would have given LEGO potentially permanent, renewable protection over the brick's shape itself, on top of whatever patent protection had already expired. A competitor challenged the registration, and the case worked its way up to the Court of Justice of the European Union (CJEU), which ruled in 2010 that a shape consisting exclusively of features necessary to achieve a technical result cannot be registered as a trademark — regardless of how famous or commercially successful that shape has become. The studs, the court found, exist to let bricks connect to each other; that's a technical function, not a brand signifier, and trademark law specifically excludes purely functional shapes from registration so that no single company can use trademark's potentially unlimited duration to extend a monopoly that patent law intentionally makes time-limited.
Why LEGO didn't need the shape mark to survive: Losing the 3D shape trademark did not leave LEGO undefended. The company continued to rely on the registered LEGO word mark, on design registrations covering specific brick and set designs, and — most distinctively — on trademark protection for the minifigure's overall appearance, which courts have treated differently from the interlocking brick because a minifigure's design is not purely dictated by technical function. LEGO also leans heavily on copyright and unfair competition law against close imitators. The lesson: functional product shapes are trademark's blind spot, and brands built around a functional design need a layered IP strategy rather than a single registration.
DKPTO and Danish Trademark Law
The Danish Patent and Trademark Office (DKPTO, Patent- og Varemærkestyrelsen) administers national trademark registration under Danish law, fully aligned with the EU Trade Mark Directive. Denmark is an EU member, so an EUTM registered at EUIPO covers the Danish market automatically — as it did for LEGO's now-invalidated shape registration, since EU trademark decisions apply across all member states at once, including Denmark. The DKPTO processes purely national applications efficiently, with registration typically completing in a few months for uncontested applications.
Filing Strategy for the Danish Market
For most international brands, Denmark is covered through an EUTM, with a national DKPTO filing added mainly as a fallback that survives an EUTM-wide invalidity challenge, or where Denmark is specifically the core market. But the LEGO case is the more important strategic point for any Denmark-based or Denmark-manufactured product brand: if your product's distinctiveness comes from its shape or functional design, don't rely on a shape trademark alone. Layer design registrations, word marks, and — where genuinely non-functional — distinctive secondary elements (packaging, color combinations, character designs) so that losing one line of protection doesn't leave the brand exposed.
Frequently Asked Questions
Why couldn't LEGO trademark the shape of its brick?
The CJEU ruled in 2010 that a shape consisting exclusively of features necessary to achieve a technical result cannot be registered as a trademark, no matter how famous it is. LEGO's stud pattern exists to let bricks connect — a functional purpose — so it fell outside trademark protection. LEGO still protects its brand through the LEGO word mark, design registrations, and the minifigure's distinctive (non-functional) appearance.
Does an EU trademark cover Denmark?
Yes. Denmark is an EU member, so an EUTM registered at EUIPO automatically covers Denmark along with the other 26 member states. A national DKPTO filing is used as a fallback that survives EUTM-wide challenges or for purely Denmark-focused brands.
When should I file nationally at the DKPTO instead of an EUTM?
A national Danish filing makes sense as a backup if your EUTM faces invalidity challenges — the Danish mark survives independently — or when Denmark is your core market and a national registration matches your footprint and supports local enforcement.
Can I designate Denmark through the Madrid Protocol?
Yes. Denmark is a Madrid Protocol member and can be designated within a WIPO international application. You can also reach Denmark by designating the EU as a whole through Madrid, since the EUTM covers Denmark.
How long does a Danish trademark last?
A DKPTO registration is valid for 10 years from the filing date and is renewable indefinitely in 10-year increments, consistent with the EU-aligned framework Denmark follows.
What language are DKPTO proceedings in?
Danish. Filings and office communications are conducted in Danish, and foreign applicants typically appoint a Danish or Scandinavian trademark attorney to manage national proceedings.
Does an EUTM cover all of Scandinavia?
No. An EUTM covers Denmark, Sweden, and Finland because they are EU members, but it does not cover Norway or Iceland, which are not in the EU. A full Scandinavian strategy must add Norway separately through a national filing or Madrid designation.
Can I claim priority for a Danish filing?
Yes. Denmark is a Paris Convention member, so a filing made within 6 months of your first application elsewhere can claim that earlier priority date, whether you file nationally or through a broader European strategy.
Should I search before filing in Denmark?
Yes — search both the Danish national register and the EUIPO register before filing, since an earlier EUTM blocks a later Danish national mark just as effectively as an earlier Danish registration. Checking both registers is the standard pre-filing step.