LAZULI
Jérémie Leroy-Ringuet
Intellectual Property Lawyer

Protect your trademarks, creations, and innovations
in an environment shaped by the rise of artificial intelligence.

LAZULI
Jérémie Leroy-Ringuet
Intellectual Property Lawyer

Protect your trademarks, creations, and innovations
in an environment shaped by the rise of artificial intelligence.

LAZULI
Jérémie Leroy-Ringuet
Intellectual Property Lawyer

Protect your trademarks, creations, and innovations
in an environment shaped by the rise of artificial intelligence.

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Lazuli
Jérémie Leroy-Ringuet
Intellectual Property Lawyer

Admitted to the Paris Bar in 2018, Jérémie Leroy-Ringuet practices intellectual property law, with a particular emphasis on trademark and copyright matters. Prior to his legal career, he spent several years in the cultural sector holding general management and communication roles within orchestras and theatre companies. This experience gives him a grounded, practical understanding of his clients’ business realities.

After gaining experience for several years at leading Parisian law firms, Jérémie founded LAZULI in April 2026. The firm advises a broad spectrum of clients, from individuals to large companies, across a wide range of industries, including media, journalism and advertising, fashion and perfumery, software, audiovisual and the arts, tourism, gaming and sports, pet products, funeral services, etc. It handles all aspects of intellectual property, from the protection and exploitation of rights to their enforcement.

The firm’s approach is pragmatic, with a strong emphasis on efficiency, responsiveness and cost-consciousness. Rather than one-size-fits-all advice, it delivers tailored, actionable solutions aligned with each client’s specific objectives.

Lazuli advises both in a transactional and contentious capacity, covering strategy, contracts, and filings, as well as litigation involving infringement and unfair competition, including matters with an international dimension. Jérémie represents and advises clients in French, English, German, Italian, and Hebrew.

Beyond his practice, Jérémie Leroy-Ringuet teaches intellectual property law and copyright litigation at the EFB (the Paris school for trainee lawyers) and at Jean Monnet University in Saint-Étienne. He also serves as an academic coordinator at the EFB and a mentor at Sciences Po Paris Law School. This teaching engagement sharpens his ability to communicate complex and fast-evolving legal issues — particularly those surrounding new technologies and artificial intelligence, with clarity and precision.

Jérémie was recognized as “key lawyer” by Legal500 for its practice of trademark and design litigation.

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Jérémie Leroy-Ringuet – Intellectual Property Lawyer - Lazuli

Lazuli’s Areas of Practice

The name LAZULI is drawn from lapis lazuli, a semi-precious stone whose rich history speaks to value, durability, and the passage of time. Revered by the ancient Egyptians who used it to represent the hair of their gods, it was later ground by European painters into the finest ultramarine blue, one of the rarest and most costly pigments of its era, reserved for only the most significant works. Across centuries, this remarkable material, transformed by human hands, became an enduring symbol of excellence, heritage, and transmission.

This history mirrors a vision of intellectual property: a creation is not a given, but a constructed value, one that must be shaped, preserved, and defended. The name LAZULI reflects a rigorous and committed legal approach, dedicated to protecting the creations, distinctive signs, and innovations that deserve recognition commensurate with their uniqueness.

Trademark Law

– Trademark filing (France, EU, international)
– Clearance searches (prior rights searches)
– Opposition proceedings, cancellation and revocation actions
– Trademark infringement
– Protection strategies and agreements (assignment, licensing, coexistence, etc.)

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Copyright
& NEIGHBOURING Rights

– Protection of works
– Agreements (assignment, licensing, publishing, live performance, etc.)
– Pre-litigation
– Litigation (plagiarism, infringement)

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Copyright
& AI

– Legal framework for content created using artificial intelligence tools
– Infringement risks related to AI
– Commercial exploitation of content
– Strategic advice

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Influencer Law
& E-reputation

– Influencer agreements
– Content liability
– Reputation crises / damage to image
– takedown notices

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Image Rights
& Privacy

– Unauthorized use of images
– Invasion of privacy
– Content removal
– Claims for damages

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IP Infringement & Unfair Competition

– Pre-litigation, cease-and-desist letters
– Intellectual property Infringement actions
– Seizure of evidence (saisie-contrefaçon)
– Unfair competition and free-riding practices

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Designs

– Design filing (France, EU, international)
– Design protection
– Pre-litigation and infringement actions
– Agreements (licensing, assignment, etc.)

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Domain Names

– Registration and strategy
– Cybersquatting
– Domain name recovery proceedings
– Litigation

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Other Areas of Expertise

– Software law
– Database protection
– Mediation and civil procedure
– Protected designations of origins & wine law

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International Expertise in Intellectual Property

LAZULI assists its clients with international intellectual property protection strategies and cross-border litigation.

Through a network of lawyers and legal professionals across numerous countries, the firm is able to implement consistent global intellectual property protection strategies and handle transnational disputes.

Experience in Transnational Matters

The firm regularly handles international matters, including:

  • Complex disputes in trademark law, copyright law, and commercial law
  • French-American copyright litigation
  • Recognition and enforcement of foreign judgments (exequatur)
  • Enforcement of decisions abroad (seizures)
  • International civil rogatory commissions (including discovery proceedings under Section 1782, see this article, in French)

A practical approach to international legal issues.

Expertise in the U.S. Market

LAZULI assists companies with their expansion projects in the United States, particularly in trademark law.

This expertise is based on Jérémie Leroy-Ringuet’s practical experience with proceedings before the USPTO, for which he now works in coordination with fellow attorneys in the United States:

  • U.S. trademark filings (see this article, in French)
  • Responses to office actions
  • Opposition proceedings (TTAB)

Experience gained within a law firm in Miami.

Fees

LAZULI’s fees are determined based on the nature of the matter, its complexity, the stakes involved, and the client’s situation. Particular attention is given to transparency and cost control.

Flat Fees

The firm favors flat-fee billing whenever possible.
This approach provides clear and predictable visibility on the cost of services.

It is particularly suited for matters such as:

  • Trademark filings
  • Drafting of agreements (assignment, licensing, etc.)
  • Drafting of cease-and-desist letters
  • Legal consultations
  • Secondment

Hourly Fees

For more complex matters, particularly litigation or proceedings before intellectual property offices (INPI, EUIPO), hourly billing may apply.

In such cases:

  • An hourly rate is set depending on the technical complexity of the matter
  • An overall cost estimate is provided
  • A fee cap may be agreed
  • Any significant change is communicated to the client in advance

All services performed are detailed in the invoices (meetings, analysis, research, drafting, hearings, etc.).

Additional Terms

Depending on the matter, the firm may offer:

  • A success fee, as a complement, in the event of a favorable outcome
  • A subscription-based arrangement for ongoing support

An advance payment (retainer) may be requested at the outset of the engagement, particularly where significant costs are expected (e.g., international trademark filing fees).

Expenses and Reimbursement

Expenses and disbursements (bailiff’s fees, trademark office fees, administrative costs, etc.) may be subject to an advance payment request or may be paid by the firm and re-invoiced with supporting documents.

In the event of a successful outcome, it may be possible to seek reimbursement of all or part of the fees and expenses from the opposing party.

Fees are stated exclusive of tax and are subject to 20 % VAT, unless otherwise specified.

FAQ – Intellectual Property

Intellectual property law allows you to legally protect your creations and innovations (trademarks, works, designs, etc.) and prevent them from being used or copied without authorization. It is also a key driver for enhancing the value of your business.

Yes, registering a trademark is essential to obtain exclusive rights of use. Without registration, you do not benefit from strong legal protection in the event of a dispute.

The cost depends on the number of classes and the territory (France, European Union, international). Official fees are added to legal fees. A tailored strategy helps optimize these costs.

Copyright protects a creation (text, image, music, source code, film, etc.) without any registration formalities.
A trademark protects a distinctive sign (name, logo) and requires registration.

IIt is advisable to register domain names related to your business as early as possible. In the event of infringement (cybersquatting), specific procedures are available to take action.

Unfair competition penalizes abusive practices (copying, confusion, free-riding, disparagement, etc.), even in the absence of intellectual property rights.

It is a confidential process, led by a mediator who brings the parties together—either at their request or at the request of a judge—to help them reach a solution to their dispute and resolve their conflict.


Protection depends on the nature of the creation:
– Copyright (automatic protection without registration)
– Trademark registration
– Design registration
– Agreements
A tailored strategy is often necessary.

It is important to act quickly. Several actions are available: cease-and-desist letter, seizure of evidence (saisie-contrefaçon), and legal proceedings. A prior assessment helps determine the most appropriate strategy.

If your trademark is registered, you can take action to stop the use. Otherwise, other legal remedies may be considered (unfair competition, parasitic practices).

In most cases, no. Most images are protected by copyright. Their use requires authorization from the rights holder, except in very limited circumstances.

The use of generative AI tools may raise issues relating to copyright, liability, and commercial exploitation. Particular care is required, especially regarding content created in this way.

Legal support helps secure your processes, anticipate risks, and optimize your strategy. It often prevents unnecessary costs and disputes in the medium to long term.

Yes. Although based in Paris, the firm can represent clients before all French and European courts and offices (INPI, EUIPO, WIPO, courts of first instance and of appeal, General Court, CJEU).
Before national courts outside of Paris, the firm uses local correspondent lawyers who facilitate communication with judges, and whose services are subject to a quote that is approved in advance by the client.