Enforcement & Litigation
A US practitioner reads 'reputed trademark' and thinks of dilution and famous marks. French law protects reputed marks well beyond their registered goods too — but on a lower threshold than US 'fame,' and with a head of protection, unfair advantage, that the Lanham Act simply does not have.
French trademark rights normally stop at the edge of the goods and services for which the mark is registered — the principle of specialty. A reputed mark is the exception. A reputed trademark (marque jouissant d’une renommée) is a registered French or EU mark that is known by a significant part of the public concerned by the goods or services it covers. Once that reputation is established, the owner can act against a later sign even for dissimilar goods and services, where the ordinary rules of similarity and likelihood of confusion would give no relief.
The governing text is Article L713-3 of the French Intellectual Property Code (CPI), which post-2019 reform prohibits the unauthorized use of a sign identical or similar to a reputed mark — for goods and services identical, similar or dissimilar — where that use, without due cause, takes unfair advantage of, or is detrimental to, the distinctive character or the repute of the mark.
For US counsel, the closest domestic analogue is federal dilution under Section 43(c) of the Lanham Act (15 U.S.C. §1125(c)). The two doctrines share the same intuition — strong marks deserve protection beyond confusion — but they diverge on the threshold, the covered harms, and the vocabulary, in ways that change how a case is built. We come back to that comparison below.
English collapses several ideas into “well-known.” French law keeps two of them apart, and the distinction is practically decisive.
The everyday case is the first one. Most US brands active in France hold French or EU registrations, so their route to extended protection is reputation under L713-3, not the unregistered well-known-mark doctrine. Getting the label right matters, because the two rest on different evidence and different legal bases.
Reputation is a question of fact, decided on the evidence. The threshold set by EU case law — which French courts and the INPI apply — is that the mark must be known by a significant part of the relevant public in the territory concerned (France for a French mark; the EU, or a substantial part of it, for an EU mark). This is deliberately lower and more flexible than a nationwide “household name” standard.
The evidence that moves the needle is quantitative and dated:
No single item is decisive, and the assessment is holistic — the file as a whole must show that the mark has acquired a standing that a later user would want to trade on. Assembling that record is the same discipline as building a genuine-use file, and much of the same material does double duty; see responding to a proof of use request.
Reputation is not a free-standing claim. Once reputation is shown, the owner must still establish a link in the mind of the public between the later sign and the reputed mark, and then one of three harms. French law, tracking the EU framework, recognizes:
A “link” is a lower bar than confusion: the public need not believe the goods come from the same source, only be caused to bring the reputed mark to mind. The recognized factors for assessing that link are the strength of the reputation, the degree of similarity between the signs, the nature of the goods and services and how far apart they are, the strength of the mark’s distinctive character, and whether any likelihood of confusion exists.
This extended protection operates on two fronts. Defensively, it strengthens an opposition before the INPI: an earlier reputed mark can block a later application reaching into unrelated classes. Offensively, it grounds an infringement action in France against use that would survive an ordinary specialty analysis — for example, an identical sign applied to goods far removed from the registration. Because reputation cases turn entirely on the evidentiary record, they belong to the more demanding end of trademark litigation in France.
Here is where US clients most often misread the risk — in both directions.
The threshold is lower in France. US dilution under Section 43(c) requires the mark to be famous — “widely recognized by the general consuming public of the United States.” Since the Trademark Dilution Revision Act of 2006, niche or market-specific fame is not enough; the bar is nationwide, general-public recognition, and only a small club of marks clears it. French reputation asks only that the mark be known by a significant part of the public concerned by its goods — which can be a specialized, professional or sectoral public. A B2B brand that would never be “famous” in the US sense can readily be “reputed” in France.
France protects against a harm the US does not recognize. US dilution law covers exactly two harms — blurring and tarnishment — which map onto the French detriment-to-distinctiveness and detriment-to-repute heads. But French and EU law add a third, independent head: unfair advantage / free-riding. There is no free-standing “you profited from my image” dilution claim in US federal law. This is often the strongest theory in a French reputation case and has no direct US counterpart.
Neither doctrine requires confusion. On this point the systems agree: both dilution and reputation protection operate independently of any likelihood of confusion, and neither requires the parties to compete. What a US client should not assume is that a mark failing the US “famous” test will also fail in France — the analysis is separate, and frequently comes out the other way.
A practical footnote: US dilution is a litigation doctrine, asserted in court. French reputation works both in court and at the registry, as an opposition ground — an earlier filter US brands can use before a conflicting French or EU mark ever registers.
For a US brand with real recognition in France or the EU, reputation is a lever worth identifying early. In clearance, it maps which of your marks can reach beyond their classes — and which competitors’ marks can reach into yours. In enforcement, it is often the difference between a claim that stops at the specialty line and one that reaches the sign wherever it appears; where litigation is disproportionate, the same strength supports an amicable settlement or a firm cease-and-desist. See our results in reputation-based cases on the results page.
Do you think one of your marks qualifies as reputed in France or the EU — or are you facing a claim that yours does? Contact us and we will assess the evidence and the options, in English.
What counts as trademark infringement in France and the EU, available remedies, and strategic options — explained for US in-house counsel and law firms.
Sending or answering a French trademark cease-and-desist (mise en demeure): content, confidentiality rules, and how to respond — for US counsel.
No discovery in France: how infringement evidence is really built — bailiff reports, saisie-contrefaçon, online proof — explained for US counsel.
Trademark litigation in France: the writ of summons, procedure, timeline, damages, loser-pays costs, and appeals — for US counsel.