Elzaburu > Madrid, Spain > Firm Profile

Torre de Cristal
P.º de la Castellana, 259 C, 28th floor
28046 Madrid

Spain > Intellectual property: Trade marks Tier 1

The powerhouse team at Elzaburu remains a market leader, taking a multidisciplinary approach to safeguarding the trade mark portfolios of major national and international corporations, advising them on a diverse spectrum of matters. These include trade mark due diligence, contentious-administrative proceedings in the High Courts of Justice and the Supreme Court, domain name recovery proceedings, and infringement, revocation and invalidity actions. Led by trade mark prosecution head Luis Baz, litigation head Antonio Castán, head of legal and business Javier Fernández-Lasquetty and head of anti-counterfeiting and anti-piracy Juan José Caselles, the group represents household names such as McDonald’s, NBA, Formula 1 and IKEA. Supported by experienced litigators Enrique Armijo Chávarri and Carlos Morán and associate María Cadarso, the team’s portfolio spans such sectors as entertainment, automotive, health, and food and beverages.

Practice head(s):


‘Brilliance, availability, kindness and success in the entrusted matters.’

Key clients



Conde Nast


Dunkin Coffee

El Corte Inglés

Formula 1

Frank Sinatra


Hard Rock Café


John Deere




MGA Entertainment





Spain > Intellectual property: Copyright Tier 2

The team at Elzaburu takes a multidisciplinary approach to protecting the copyright portfolios of major national and international corporates in the media and entertainment sector, advising them on a diverse spectrum of matters. These include audio-visual rights, breaches of contract, infringement, rights assignments, publishing agreements and licensing. Led by litigation head Antonio Castán, head of legal and business Javier Fernández-Lasquetty and head of anti-counterfeiting and anti-piracy Juan José Caselles, the team’s client base features MGA Entertainment and Pokeepsie Films. Mabel Klimt is another name to note, regularly taking a leading role on many of the department's key matters.

Spain > Intellectual property: patents Tier 3

The team at Elzaburu takes a multidisciplinary approach to safeguarding the patent portfolios of major national and international corporations. Balancing a broad practice, the team provides advice on patent prosecutions, third-party oppositions, patent infringements, patentability analysis and preliminary injunctions on the basis of unfair competition. Led by patent head Francisco Saez, litigation head Antonio Castán and head of legal and business Javier Fernández-Lasquetty, the group represents key market players such as Acciona and Airbus, across a client base that spans the retail, pharmaceuticals, technology, chemicals and telecoms sectors. The team is supported by unfair competition expert Enrique Armijo Chávarri and junior associate María Cadarso.


‘Elzaburu has a highly professional IP litigation team.’

‘Enrique Chavarri, Antonio Castan, and Maria Cadarso are very professional and diligent.’

Key clients

Acciona Infraestructuras


El Corte Inglés

Fundación Botín

Laboratorios Farmacéuticos Rovi, S.A.

Spanish National Cancer Research Centre (CNIO)


Elzaburu is a European IP firm based in Spain and established in 1865. It is made up of lawyers, patent and trademark attorneys, engineers and graduates in chemistry, biology and physics.

The firm deals with intellectual property rights in their broadest sense: all aspects of trademarks, patents, designs, copyrights, software licensing and development and other IT matters, unfair competition, advertising law, domain names, antitrust law, media and entertainment and related fields.

Elzaburu’s headquarters are based in Madrid and there are offices in Alicante, Valencia, and Beijing .

Trademarks and domain names: Elzaburu specialises in furnishing full-service advice, thereby assuring effective legal protection for its clients’ trademarks and tradenames in all national, European, and international jurisdictions. The firm is an officially appointed Registrar for both “.eu” and “.es” domain names and offers all necessary services for cost-effective domain name registration and management worldwide.

Patents and designs: Elzaburu has the specialised means and know-how to protect the innovative endeavours of companies and designers wherever protection is needed.

Elzaburu’s patent team includes specialists in the full range of scientific and technical fields, eg, engineers in the different engineering disciplines, chemists, biochemists and biologists, prepared to advise and guide clients through the complexities of the procedure of patenting an invention or registering a design anywhere in the world from start to finish.

Litigation and ADR: The firm’s litigation group comprises a team of fully bilingual, specialised litigation lawyers highly experienced in all forms of intellectual property disputes, eg, trademark, patent and copyright infringement, counterfeiting and piracy, designs, media and entertainment, unfair competition, unfair advertising, etc, who can advise and represent clients in both civil and criminal matters before the Spanish courts and, as appropriate, before the Spanish Customs Authorities, the Court of Justice of the European Union, and dispute resolution service providers.

The firm also has extensive experience in international cross-border intellectual property litigation and in working for foreign clients and liaising with lawyers in other jurisdictions, to fully serve all its clients’ needs. The firm’s litigation lawyers include authorised mediators registered with official mediation centres who are experienced in both national and international matters.

Anticounterfeiting: Elzaburu’s anticounterfeiting team works in close cooperation with Customs, the police, prosecutors, and the courts and has extensive experience in uncovering counterfeiting, gathering criminal evidence, and then bringing criminal proceedings with a view to obtaining convictions and damages.

Media and entertainment: Elzaburu offers comprehensive legal advice for rightholders in all the different sectors of the entertainment industry (music, theatre, motion pictures, television, etc).

Besides furnishing advice on IP right purchasing and licensing agreements, conducting or assisting in the negotiating process, and defending our clients’ interests in court, arbitration, and mediation proceedings, the firm can help in complying with regulatory requirements set by the authorities and in optimizing business procedures.

Legal and business: Elzaburu Legal & Business practice provides specialised advice and services in all types of transactions involving IP rights, personality rights and IT.

From the assignment or licensing of rights to complex joint ventures, the firm has expertise all across the full spectrum of areas, such as audiovisual and advertising, franchising, agency and other commercial agreements, software development and implementation, internet related matters, data protection, R&D and technology transfer in the different scientific fields, including biotech and so forth.

In the field of R&D and TT agreements, the team of advisors comprises staff members specialised in different scientific fields. Other services provided by the firm include valuation and audits of all kinds of IP assets and advice on public funding for R&D projects.

Head of the Patent Department Patricia Salama
Head of the Trademark Department Luis Baz
Head of the Legal Department Antonio Castán
IP counterfeiting and piracy Juan José Caselles
Head of IP legal and business Javier Fernández-Lasquetty
Head of IP media and entertainment Mabel Klimt
Javier Úbeda-Romero  photo Javier Úbeda-Romero Associate Partner.
Colm Ahern  photo Colm Ahern Partner.
Agustín Alguacil photo Agustín AlguacilAssociate.
Mónica Amores  photo Mónica Amores Senior Associate.
Enrique Armijo Chávarri  photo Enrique Armijo Chávarri Partner.
Cristina Arroyo  photo Cristina Arroyo Associate Partner. Head of the Foreign Trademark Department
Luis Baz  photo Luis Baz Partner. Head of the Trademark Department
Luis Beneyto  photo Luis Beneyto Partner.
Soledad Bernal photo Soledad BernalAssociate.
Catherine Bonzom  photo Catherine Bonzom Associate Partner.
María Cadarso photo María CadarsoAssociate.
Juan José Caselles  photo Juan José Caselles Associate Partner.
Antonio Castán  photo Antonio Castán Partner. Head of the Legal Department
Ignacio Diez de Rivera Elzaburu  photo Ignacio Diez de Rivera Elzaburu Partner. President
Javier Fernández-Lasquetty  photo Javier Fernández-Lasquetty Partner.
Mercedes García  photo Mercedes García Associate Partner.
Fernando Ilardia  photo Fernando Ilardia Partner.
Mabel Klimt  photo Mabel Klimt Managing Partner.
Alba Mª López  photo Alba Mª López Associate Partner.
Xavier Lamíquiz  photo Xavier Lamíquiz Associate Partner.
Elena Martín  photo Elena Martín Associate
Miguel Ángel Medina  photo Miguel Ángel Medina Associate Partner.
Carlos Morán  photo Carlos Morán Associate Partner.
Paloma Querol photo Paloma QuerolAssociate. Lawyer in the office of Elzaburu in Valencia
Jesús Quintana  photo Jesús Quintana Resident in change of the office of Elzaburu in Beijing
Marina Reig photo Marina ReigAssociate.
Marta Rodríguez  photo Marta Rodríguez Senior Associate.
Juan A. Romero photo Juan A. RomeroAssociate.
Tránsito Ruiz  photo Tránsito Ruiz Associate.
Francisco Javier Sáez  photo Francisco Javier Sáez Partner.
Ruth Sánchez  photo Ruth Sánchez Associate Partner.
Juan Miguel Sainz de Marles  photo Juan Miguel Sainz de Marles Associate Partner.
María Vázquez  photo María Vázquez Associate.
Bosco de la Vega  photo Bosco de la Vega Associate
Number of lawyers : 60
at this office : 56
Union IP
AEDC Asociacion Española para la Defensa de la Competencia
ALAI (The International Literary and Artistic Association)
International AntiCounterfeiting Coalition (IACC)
Contact : Ignacio Diez de Rivera (Head of Operations)
Other offices : Alicante
Other offices : Beijing
Other offices : Valencia

ELZABURU values diversity and respects the individual. Our practitioners play a key role in ensuring the firm’s sustainability and make up the nucleus of its prestige.

The creation and maintenance of employment and the professional development of its employees through continuous learning programmes is a key business priority for ELZABURU. Mechanisms are in place to allow for flexibility in the organization of work, the rationalization of working hours and, consequently, the reconciliation of private and professional life. Cultural and sporting activities for employees are likewise promoted. Within the context of their contribution to the world of education and commitment to the service of society, ELZABURU’s practitioners engage proactively and voluntarily in the dissemination of knowledge in the field of intellectual property through publications, articles in the press and participation in conferences, workshops, courses and seminars.

Our focus on diversity and inclusiveness is integral to how we serve our clients, develop our people and play a leadership role in our communities.

Corporate Social Responsibility

ELZABURU contributes actively, through its CSR policy, to the fostering of sustainable development, integrating within the firm’s strategic management the economic, social and environmental concerns arising out of transparent relations and dialogues with the corresponding interest groups.

The CSR policy is fuelled by the professional team which embodies those values and sustains our activity and relations with our clients.

The Firm’s Values are:

  • Rigor, frankness and balance (in providing advice)
  • Fairness, modesty and good faith (in manner and conduct)
  • Partnership, buoyancy and openness (in relations with clients and fellow team members)

Good governance

In the course of its activities ELZABURU adheres strictly to the rules of ethics and conduct established by the relevant professional associations and to its internal Code of Ethics. ELZABURU similarly has a specific system in place for the avoidance of conflicts of interest. Lastly, within the dedication to excellence which characterizes the strategic management of the firm, ELZABURU has obtained the ISO 9001 certification.

Social dimension


The Pro-Bono advisory programme was started up in 2016 with the assistance of the Alberto Elzaburu Foundation. Through this initiative the firm meets its commitment to share disinterestedly with society its know-how and experience in the field of intellectual property.

Elzaburu is one of the founding members of the Fundación Pro Bono España and it activily contributes with its goals, offering pro-bono advice to different foundations and associations.

UN Global Compact

ELZABURU adheres to the UN Global Compact, an international initiative for the promotion through corporate social responsibility of the implementation within the strategies and procedures of businesses of the ten universally proclaimed principles in the areas of human rights, labour standards, the environment and the fight against corruption.

Environmental impact

ELZABURU has implemented a series of projects with a view to diminishing the environmental impact of the activities of the firm. The consumption of paper has been cut, the number of files kept on paper has gone down sharply, paper shredders are in operation, recycling bins for different products are available, etc.