Lego bricks and figures are iconic toys that keep millions of children (and a fair few adults) around the world entertained. Their commercial success worldwide has triggered many attempts by competitors to imitate their designs and essential characteristics. Some of these attempts have been in compliance with intellectual property rules, and accordingly, courts have correctly rejected Lego's legal moves to stop such "legal" imitations. But others have not been so lucky.

Lego has won its latest trademark battle after a European Union court recently ruled that its minifigures should continue to be classed as protected shapes. The decision followed an attempt by Best-Lock, a Lancashire-based toy manufacturer, to appeal against the trademark protection to allow it to produce similar products, along with the lego-compatible toys it already produces. So are the little figures distinctive enough to warrant protecting?

Shapes of products can be registered as trademarks, provided they are distinctive and therefore enable consumers to recognize the trade origin of the good. The typical example is the Coca-Cola bottle: its shape has been registered as a three-dimensional trademark by the Atlanta-based giant. Lego registered its figures as a three-dimensional trademark in 2000.

Even when products are distinctive, however, they may be denied trademark protection if the shape itself is also deemed to serve a technical function. This is to protect competition. It ensures that companies cannot use trademark law in order to perpetually monopolize technical solutions (trademark registration can be renewed every ten years, potentially for ever) and therefore block technological progress.

For this reason, Lego was denied the trademarking of its eight-studded brick back in 2010. After years of legal action, the EU's top judicial body upheld a challenge by Canadian toymaker Mega Brands who argued that a trademark on the the Lego brick would prevent competitors (including their Mega Bloks bricks) from manufacturing and selling a basic technical building shape. The court agreed.

Patents

If companies want to protect technological solutions they must use patents, which are limited in time (just 20 years from the date of application). This ensures that the public at large can benefit from inventions once the term of the patent protection expires.

These points had been stressed by Best-Lock, which also manufactures cheap plastic building bricks that are compatible with Lego. Their case was based on the idea that the shape of Lego's little men and women is their defining technical characteristic. They argued that the minifigures are merely toy building blocks designed for play purposes.

They therefore serve — Best-Lock argued — a technical function. And they do so because of the mobility of the figures and because the holes under the figures' feet enabled them to be connected to other Lego bricks. This is why these technical features had been protected by a patent filed by Lego in the 1970s, which has now expired.

Aesthetics trumps technicality. Image: Lego

The aim of Lego's competitor was clear. They tried to have Lego's trademark registration cancelled in order to be able to produce and sell themselves replicas of the men and women figures and thus erode the dominant position held by Lego in the toy market. Yet, Best-Lock's arguments failed to convince the court.

This time, the judges found that the key elements of the shape of the Lego figures — the head, body, arms and legs — do not actually involve the ability to join them to other building blocks. They therefore serve no technical function. Instead they are designed mainly to confer human traits on those figures — their function is aesthetic and fully distinctive. This means they can be protected by a trademark registration, according to the court.

This is a major victory for Lego as it can keep suing competitors with a view to stopping them producing and selling replicas of the little figures – and so maintain a position at the top of toytown. This ruling will effectively help Lego monopolize this distinctive toy. It is also a timely decision for the Danish toymaker as it comes exactly in the year the Lego brand has replaced luxury sports car brand Ferrari as the "World's Most Powerful Brand".

This article originally published at The Conversation here