Assos v Asos: ASOS infringed ASSOS’s trademark but wins on the own name defence
AssosvAsos Plc
- Court
- Court of Appeal
- Judgment
- 1 April 2015
- Citation
- [2015] EWCA Civ 220
Even a technical trademark win can lead nowhere if the other side has a valid own name defence.
Cycling clothing brand Assos sued online fashion retailer ASOS for trademark infringement. The Court of Appeal found infringement in theory, but ASOS won anyway because of the own name defence.
What happened
Assos, a maker of premium cycling clothing sold through specialist shops, held a European trademark for ASSOS. ASOS, the online fashion retailer aimed at young adults, held a UK trademark for ASOS. The two businesses had traded alongside each other for over a decade without any customers actually confusing them. Assos sued for infringement and passing off. ASOS counterclaimed, arguing Assos's trademark registration covered more goods than it had actually used the name for, and that it ought to be cut down. The case turned on how courts are meant to compare trademarks, not on whether real shoppers had ever mixed the two up.

What did the court decide in Assos v Asos Plc?
The majority of the Court of Appeal found that comparing the two marks on a fair, notional basis across the full range of goods Assos's trademark covered, there was a likelihood of confusion. That meant ASOS's sign infringed the ASSOS trademark. But ASOS successfully relied on the own name defence, a rule that protects a business using its own name honestly in trade, even if that name turns out to overlap with someone else's trademark. Because ASOS had adopted its name honestly and had taken some steps over the years to avoid clashing with Assos, the defence applied. The infringement claim therefore failed in practice. The court also declared ASOS's own UK trademark partly invalid, so it no longer covers clothing or the retail of clothing. And it widened Assos's trademark a little: the trial judge had limited it to specialist clothing for racing cyclists, and the Court of Appeal removed the word 'racing'. One judge disagreed, taking the view that Assos's trademark ought to cover a wider range of casual clothing and that ASOS's conduct wasn't honest enough for the own name defence to succeed.
What we learned from this
- What I'd take from this is that winning the legal argument on paper doesn't always mean winning the case. ASOS was found to infringe on a technical comparison of the marks, but still walked away without an injunction or damages because of the own name defence.
- Courts don't just look at whether real customers were confused. They ask what would happen if the trademark were used fairly across everything it covers, even goods the owner hasn't actually sold.
- If you're using your own company name and you adopted it honestly, that can be a genuine shield against an infringement claim, even where another business got there first.
- Long, peaceful coexistence in the market doesn't settle a trademark dispute on its own. The legal test is broader than whether anyone has actually been confused so far.
Things to be aware of
- The own name defence only helps if the name was adopted honestly and used in line with honest commercial practices, something the court can still assess years later.
- A finding of 'likelihood of confusion' is based on a theoretical fair use test across the whole registration, not on whether confusion has actually happened in the market.
- One judge in this case would have decided both key questions differently, showing how finely balanced these cases can be even at a senior court.
The businesses involved
The claimant
Representing Assos, the manufacturer of premium cycling clothing sold through specialist cycling shops, and holder of the ASSOS trademark at the centre of the dispute.
Asos Plc
Registered in England in 2000 and still active. Operates the online fast fashion and cosmetics retail business asos.com, aimed at young adults, and holds 111 trademarks on the UK trademark register.
- Companies House
- 04006623 Active
- Incorporated
- June 2000
- Registered office
- London
- Business activity
- Activities of head offices
- UK trademarks
- 111
How we can help
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This page is for information purposes only and does not constitute trademark advice or guidance. Summary drafted with AI assistance from the published judgment and checked by The Trademark Helpline (how we write these). Judgment: [2015] EWCA Civ 220 on Find Case Law, published under the Open Justice Licence. Company details from Companies House; trademark counts from the UK trademark register. Last reviewed 27 October 2026. Report an error.










