Practice area 02
Intellectual property

The trademarks, creations and names that distinguish a business are often the most valuable part of its assets. Cabinet KENDER advises creators, wine estates, food and beverage companies and innovative businesses on the protection, exploitation and enforcement of their intellectual property rights, in France, in the European Union and in the United States.
Admitted to the Paris Bar and to the New York Bar, William KENDER is able to represent applicants based outside the United States before the United States Patent and Trademark Office (USPTO), which since 2019 has required representation by an attorney licensed in a U.S. state. This dual admission makes it possible to pursue a consistent trademark strategy on both sides of the Atlantic, with a single point of contact. On patent matters, the firm works, with the client's consent, alongside patent and trademark attorneys (*conseils en propriété industrielle*).
Protecting and enhancing your intangible assets
Trademarks and distinctive signs
- Clearance searches and availability analysis before any launch
- Filing and prosecution of French (INPI), European Union (EUIPO), U.S. (USPTO) and international (Madrid system) trademarks
- Management and monitoring of trademark portfolios, renewals and declarations of use in the United States
- Trademarks for wines, spirits and food products, and their interplay with designations of origin and geographical indications
Creations, contracts and transfer of rights
- Protection of creations under copyright (droit d'auteur) and design law
- Drafting and negotiation of assignment, licence, coexistence and distribution agreements
- Intellectual property clauses in service, collaboration and employment contracts
- IP due diligence in acquisitions, fundraising and business transfers
Enforcing your rights
Proceedings before the offices
- Oppositions and third-party observations before the INPI and the EUIPO
- Responses to USPTO examiners' objections (Office Actions)
- Proceedings before the Trademark Trial and Appeal Board (TTAB): oppositions and cancellations
- Invalidity and revocation actions for non-use
Infringement and unfair competition
- Cease-and-desist letters and negotiation of amicable settlements
- Bailiff reports, infringement seizures (saisies-contrefaçon) and interim measures
- Actions for infringement, unfair competition and free-riding (parasitisme)
- Domain name recovery (UDRP and Syreli procedures) and takedown of online content
FAQ
Frequently asked questions
Yes. Since 3 August 2019, the USPTO has required applicants whose domicile or principal place of business is outside the United States to be represented by an attorney admitted to the bar of a U.S. state. This requirement applies to the filing itself and to all subsequent proceedings (responses to objections, declarations of use, renewals).
No. Trademark law is territorial: a French trademark has effect only in France. To be protected elsewhere, you must file a European Union trademark, national trademarks in the countries concerned, or an international trademark through the Madrid system. A six-month priority period from the first filing allows protection to be extended while keeping the date of that first filing.
In France and in the European Union, registration is valid for ten years and may be renewed indefinitely. In the United States, registration is also renewable every ten years, but the owner must in addition show use of the mark between the fifth and sixth year after registration, and at each renewal. In all cases, a mark not used for five years is exposed to revocation.
It is strongly recommended. In France and in the European Union, the office does not examine of its own motion whether earlier trademarks exist: it is for the owners of earlier rights to file an opposition. A prior search makes it possible to assess the risk of opposition or of an infringement action before investing in a name, packaging or a label.
The first step is to preserve evidence (a report by a commissaire de justice, or judicial officer; dated screenshots; test purchases), then to analyse the situation before sending a formal notice. In France, the infringement seizure (saisie-contrefaçon) allows evidence to be obtained with the court's authorisation. An infringement action is in principle time-barred five years from the day the owner knew or should have known of the last fact enabling it to be brought.
General information article, up to date as of October 11, 2026. It does not constitute legal advice and cannot replace an attorney's analysis of a specific situation.
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