Litigation, drafting of copyright agreements and copyright consultations.

Internet Law

Consultation and effective prevention of intellectual property online.


Registration and protection of national, European and international trademarks.

Industrial Design

Registration and protection of national, European and international industrial designs.

IUSAUTHOR is a leading law firm specializing in intellectual property protection and development. The firm has offices in several major cities in Bulgaria and has recently further expanded its practice by opening an office in Oxford, UK. Since its establishment in 2004, IUSAUTHOR specializes in protection of intellectual property rights, trademarks, industrial designs, patents, Internet law, domain names and other online business identifications, as well as in the area of unfair competition, development of brand strategies, trade mark portfolio management and know how. Our clients value us for our loyalty, commercial awareness and in-depth knowledge of local, European, and international law. We are especially well regarded for our full commitment to each case and for the outstanding representation of our clients. We provide fully integrated IP services in wide range of industries. Our winning strategy is rigorous selection of the best legal approach to the matter at hand and giving our clients the competitive edge to increase the value of their businesses.  In 2018, “IUSAUTOR” was nominated for the Law Firm of the Year in Bulgaria by the prestigious law magazine "Legal World".

Our legal services cover all stages of the IP life cycle: we provide national and international consultations and counselling, dispute resolution advice and representation in litigation and alternative dispute resolution proceedings. IUSAUTHOR’s national legal services comprise of consultations and counselling regarding the registration and protection against infringement of intellectual property objects in Bulgaria, namely intellectual property rights, trademarks, patents, industrial designs, utility models, geographical indications, copyright and trade secrets. We also provide representation before the Bulgarian Patent Office (BPO) by a qualified industrial property representative. Our lawyers are also qualified to represent clients in wide range of intellectual property disputes before the competent national courts.

Many of IUSAUTHOR’s cases concern wide range of issues related to unfair competition and legal representation before the Bulgarian Commission on Protection of Competition and the Supreme Administrative Court. With that regard we have developed extensive experience dealing with disputes concerning Article 35 of the Law on Protection of Competition. Our expertise also covers counselling and legal representation in disputes related to unfair competition in much more general terms, such as: public procurement appeals, concentrations between undertakings, cartels and anti-competitive agreements, etc.   

IUSAUTHOR is dedicated to giving our clients the competitive edge and, as such, we focus on counselling and protection of online art and businesses, which operate online. Some of our clients are leading computer, software, start-up and online-based companies, as well as IT specialists in Bulgaria. We also represent clients in disputes related to online legal relations between individuals and entities, website terms and conditions, protecting content on the internet, fishing, registering domain names as trademarks, online bank transactions, resolution of disputes between trademark holders and registrants of domain names, etc. For many years now IUSAUTHOR is also the leading law firm in Bulgaria providing consultations concerning cases related to ‘free software’ working under Linux and GPL licences of the Free Software Foundation, Europe. 

The international services provided by IUSAUTHOR cover:

  • Registration of Community trademarks and Community designs in the European Union Intellectual property office(EUIPO), Alicante, Spain;
  • Registration of Community patent in the European Patent Office (EPO), Munich, Germany;
  • Registration of international trademarks, industrial designs and patents under the Madrid System (the Madrid Agreement and the Madrid Protocol), respectively under the Hague System (the Hague Agreement and the Patent Cooperation Treaty (PCT);
  • Registration of copyrights in the U.S. Copyright Office, as the scope of this protection cover all states parties to the Berne Convention; and
  • Representation before the World Intellectual Property Organization (WIPO), Geneva, Switzerland.


IUSAUTHOR also provides legal representation in proceedings before EUIPO, EPO, WIPO and the European Court of Justice.

"IUSAUTHOR is the law firm of the year in Bulgaria for 2021.


"IUSAUTHOR is the law firm of the year in Bulgaria for 2021.


On December 3, 2021 (Friday) at an official ceremony in the Hotel "Marinella", Sofia, were held the National Justice Awards, which are organized by the "Balkan Media Association", with the support and assistance of the International Bar Association, the Bar Associations...

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Our Partners

  • Marzillier, Dr. Meier & Dr. Guntner

  • Kostov & partners

  • Bulgarian Consultin Group

  • Create Designs