Three parallel stripes are Adidas’ most recognizable visual symbol. Since the 1950s, this design has been deeply integrated with sportswear and become a brand icon in the minds of consumers worldwide. However, the more successful a logo is, the more likely it becomes a focal point of legal disputes. After decades of enforcement actions across multiple jurisdictions, one core question has grown increasingly clear: How exactly should the boundary of trademark protection be defined?
New Litigation: The Stripes Dispute Enters a New Round
In early 2026, the dispute between Adidas and American apparel retailer Abercrombie & Fitch (A&F) attracted renewed attention. The two parties went to court over stripe designs on casual wear. This was not their first confrontation: as early as 2005, Adidas sued A&F in the U.S. District Court for the District of Oregon, accusing the brand of using designs too similar to its Three-Stripes trademark on pants and sweatshirts in its online catalog. Years later, a similar dispute has resurfaced, reflecting the persistent tension over the simple stripe design element under the framework of trademark law.
Around the same time, Adidas’ enforcement efforts in the U.S. faced direct judicial skepticism. In January 2026, U.S. Magistrate Judge Jeff Armistead raised sharp questions about the scope of Adidas’ claimed Three-Stripes trademark while hearing Adidas v. Hall of Fame Sports Memorabilia: “Can it be anything with three vertical or semi-vertical lines?” The judge further pointed out that Adidas failed to sufficiently explain the precise correspondence between the accused infringing products and its registered trademarks, stating, “I’m not sure this puts the defendant on clear notice of what is being infringed.” This challenge struck at the weakness of Adidas’ enforcement strategy: when trademark claims are overly broad, their scope of protection may be too vague to gain judicial support.
UK Final Ruling: Position Marks Invalidated for “Lack of Clarity”
If the U.S. judge’s skepticism remained procedural, the ruling of the Court of Appeal of England and Wales dealt a substantial blow to Adidas’ core trademark assets. On October 23, 2025, the UK Court of Appeal dismissed Adidas’ appeal against Thom Browne and upheld the High Court’s decision: six of Adidas’ “position marks” were held invalid due to lack of registrability.
The lawsuit stemmed from invalidation proceedings filed by Thom Browne against 16 of Adidas’ Three-Stripes trademarks. In its November 2024 judgment, the UK High Court noted that some of Adidas’ registered trademarks took the form of “position marks,” whose written descriptions allowed excessive variations in the length, position and direction of the stripes on clothing—for example, described as “one-third or more of the sleeve length” while the accompanying image showed stripes running the entire sleeve. The court held that such inconsistency between text and image meant the trademarks could not be clearly and precisely defined as a “single sign,” violating the basic conditions for trademark registration. In his judgment, Lord Justice Arnold reaffirmed that a trademark must be a single objectively identifiable sign presented in a clear and precise manner; Adidas’ broad written descriptions conferred an unfair competitive advantage, so the relevant registrations were invalid.
Notably, this was not Adidas’ first loss in its dispute with Thom Browne. In January 2023, a jury at the U.S. District Court for the Southern District of New York ruled that Thom Browne’s four-stripe design did not infringe Adidas’ Three-Stripes trademark; in November 2024, the UK High Court also dismissed all of Adidas’ infringement claims.
The Cost of Global Enforcement: From “Land Grabbing” to “Blurred Boundaries”
Adidas’ defense of the Three-Stripes is a typical case of intellectual property enforcement for sports brands. According to incomplete statistics, Adidas has filed more than 90 stripe-related lawsuits or opposition proceedings worldwide over the past decade, signing over 200 settlement agreements with brands including Nike, Forever 21, Tesla and Marc Jacobs. This proactive enforcement strategy has consolidated the market exclusivity of its brand logo to a certain extent, but it has also gradually exposed structural risks in its trademark registration system.
The UK Court of Appeal’s judgment reveals a profound legal logic: trademark protection is not a “land grab.” When a right holder attempts to capture as many design variations as possible through vague written descriptions, it may instead face judicial rejection for failing to precisely define the scope of protection. When the boundaries of a registered trademark are unclear, competitors cannot anticipate risks and consumers cannot establish stable source identification—undermining the “clarity” principle on which the trademark system operates. As the UK court noted, the goal of trademark registration is not to grant a monopoly over an abstract concept, but to protect a specific sign with a clear and understandable scope of protection.
Lessons: Clarity Is the Premise of Successful Enforcement
Adidas’ Three-Stripes dilemma offers an important mirror for global brands. For enterprises with iconic visual elements, there is a perpetual tension between the “width” and “precision” of trademark registration. Overly narrow registrations may leave room for circumvention, while overly broad descriptions may be invalidated entirely for lack of clarity. Especially in non-traditional trademark areas such as position marks, visual representations and written descriptions must be strictly consistent—any combination of “illustrative” images and “open-ended” descriptions may become a breakthrough for future invalidation proceedings.
For market researchers and brand managers, the lesson from these rulings is clear: the maintenance of trademark value depends not only on popularity, but also on the judicial confirmability of the scope of rights. Before taking enforcement action, enterprises must first review their own registration portfolio—trademarks that rely on reputation but lack precise definition may not withstand strict registrability review in court. Where exactly is the line between the three stripes? The answer may lie not in the stripes themselves, but in whether the written text on the registration certificate provides a unique and definitive answer.
