Firm Profile > Elzaburu > Madrid, Spain

28010 MADRID

Spain > Intellectual property: Trade marks Tier 1

Elzaburu provides the full range of advice on trade marks, advising a prestigious client base on registration and administrative procedures, contract law and litigation. Luis Baz heads the team, which attracts instructions from a diverse list of sectors, from cosmetics and fashion to the sports and entertainment industries. Baz specialises in litigation across the spectrum of IP matters and also has specific strength in domain names and infringement of IP rights on the internet. Litigation department head Antonio Castán is a key contact and Fernando Ilardia has recently covered contentious trade mark issues in the entertainment, technology and food industries. Javier Fernández-Lasquetty and Juan José Caselles are further names to note.

Practice head(s):

Luis Baz

Other key lawyers:

Antonio Castán; Fernando Ilardia; Javier Fernández-Lasquetty; Juan José Caselles; María Cadarso; Tránsito Ruiz

Key clients



















Spain > Intellectual property: Copyright Tier 2

The media and entertainment specialists at Elzaburu regularly work on copyright issues, advising rights holders in all areas of the media and entertainment industry, both domestic and internationally. The firm offers a full service, from regulatory advice to negotiating contracts, through to contentious matters with arbitration or litigation, and also has a notable anti-piracy specialism. Mabel Klimt has notable expertise advising audio-visual companies on image rights and licensing, while Antonio Castán is an experienced litigator across all IP disciplines. Javier Fernández-Lasquetty focuses on IT matters and litigation, while Juan José Caselles heads up the anti-counterfeiting team.

Practice head(s):

Mabel Klimt; Antonio Castán; Javier Fernández-Lasquetty; Juan José Caselles

Key clients

Pokeepsie Films

Spain > Intellectual property: patents Tier 2

Elzaburu has a full-service patent offering, covering prosecution, litigation and transactional support. Clients include multinationals in several sectors, most notably technology and engineering, as well as a number of domestic life sciences companies. The team is overseen by litigation head Antonio Castán, biotech and social network-focused Javier Fernández-LasquettyFrancisco Javier Sáez, who leads the patent prosecution department, and Juan José Caselles, who is the head of the firm's anti-counterfeiting team and an experienced litigator.

Practice head(s):

Francisco Javier Sáez; Antonio Castán; Javier Fernández-Lasquetty; Juan José Caselles

Key clients

Acciona Infraestructuras


Fundación Botín

Laboratorios Farmacéuticos Rovi

Medac Gmbh

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.

Department Name Email Telephone
Head of the Patent Department Francisco Saez
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
Photo Name Position Profile
 Javier Úbeda-Romero  photo Javier Úbeda-Romero Associate Partner.
Mr Colm Ahern  photo Mr Colm Ahern Partner.
 Mónica Amores  photo Mónica Amores Associate.
 Enrique Armijo Chávarri  photo Enrique Armijo Chávarri Partner.
Mrs Cristina Arroyo  photo Mrs Cristina Arroyo Associate. Head of the Foreign Trademark Department
Mr Luis Baz  photo Mr Luis Baz Partner. Head of the Trademark Department
Mr Luis Beneyto  photo Mr Luis Beneyto Partner.
Mrs Catherine Bonzom  photo Mrs Catherine Bonzom Associate Partner.
 Juan José Caselles  photo Juan José Caselles Associate Partner.
 Antonio Castán  photo Antonio Castán Partner. Head of the Legal Department
Mr Ignacio Diez de Rivera Elzaburu  photo Mr Ignacio Diez de Rivera Elzaburu Partner. Vicepresident
Mrs Ana Donate  photo Mrs Ana Donate Associate Partner.
 Cristina Espín  photo Cristina Espín Associate
 Javier Fernández-Lasquetty  photo Javier Fernández-Lasquetty Partner.
 Mercedes García  photo Mercedes García Associate Partner.
Mr Fernando Ilardia  photo Mr Fernando Ilardia Partner.
Mrs Mabel Klimt  photo Mrs Mabel Klimt Partner
 Alba Mª López  photo Alba Mª López Associate
 Manuel Mínguez  photo Manuel Mínguez Associate. Resident in charge of the office of Elzaburu in Valencia
 Elena Martín  photo Elena Martín Associate
 Miguel Ángel Medina  photo Miguel Ángel Medina Associate Partner.
 Carlos Morán  photo Carlos Morán Associate Partner.
 Jesús Quintana  photo Jesús Quintana Resident in change of the office of Elzaburu in Beijing
 Marta Rodríguez  photo Marta Rodríguez Associate
 Tránsito Ruiz  photo Tránsito Ruiz Associate.
 Francisco Javier Sáez  photo Francisco Javier Sáez Partner. Head of the Patent Department
 Ruth Sánchez  photo Ruth Sánchez Associate Partner.
Mr Juan Miguel Sainz de Marles  photo Mr Juan Miguel Sainz de Marles Associate Partner. Head of the Foreign Trademark Department
Mrs Patricia Salama  photo Mrs Patricia Salama Associate
 José Ignacio San Martín  photo José Ignacio San Martín Associate Partner.
Mrs Ana Sanz  photo Mrs Ana Sanz Associate.
Mr Pedro Saturio  photo Mr Pedro Saturio Associate Partner.
 María Vázquez  photo María Vázquez Associate.
Mr Bosco de la Vega  photo Mr Bosco de la Vega Associate
Number of lawyers : 60
at this office : 56
Union IP
AEDC Asociaci?n Espa?ola 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)

a) 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.

b) 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. Some of the projects carried out include the organization of law clinics or the counselling of start-ups and NGOs.

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.

Alberto Elzaburu Foundation

Many of the firm’s CSR initiatives are channeled through the Alberto Elzaburu Foundation, whose mission is to foster and promote innovation and intellectual property as a mainstay of entrepreneurship, employment, investment, development and business activity, and to nurture creativity in the digital environment. To that effect the Foundation organizes an annual award for innovation; grants for postgraduate IP studies; roundtables on current issues in the legal field; and social action programmes.

c) 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, LED lamps have been installed for reasons of electrical efficiency, new closures have been fitted, paper shredders are in operation, etc.