Network Member


Goce Delchev compl., bl.233, fl.8, ap.35
1404 Sofia

Telephone: +359 (2) 858 03 45
Fax: +359 (2) 858 03 45

Konstantin Tahtadjiev EOOD

About us

Established in 1993, Mr. Kostadin Tahtadjiev's patent bureau is one of the leading Industrial Property offices in Bulgaria. Dipl. Eng. Kostadin Tahtadjiev is a Bulgarian patent and trademark attorney, registered under No 1 in the list of industrial property representatives before the Bulgarian Patent Office and a European patent attorney practising Industrial Property for over 35 years. He has gained considerable experience over time teaming up and networking with globally acclaimed IP law firms and foreign multinational companies.

The bureau’s emphasis is on preparation, filing and prosecution of Bulgarian patent applications, European patent applications, European Patent Validation in Bulgaria, PCT applications, PCT national phase in Bulgaria, utility model registrations, trademark registrations and industrial design registrations, as well as the maintenance and defense of the obtained industrial property rights for Bulgarian and foreign clients. We attach great importance to repeatedly analyzing and optimizing strategies in industrial property rights concerning the relationship between costs and benefits for our clients in particular. In the protection of industrial property, technical qualification and concrete argumentation count above all else. Our identification with the requirements of our clients reveals itself in detail, showing our technical competence and individuality derived from the personality of each member of our team.

Our team is trained to offer patent prosecution advice in all traditional technical fields as well as in those of the most recent technologies from mechanics to electronics and telecommunications, from chemistry and pharmaceutics to biotechnology, from the topography of semiconductors to the patent protection of software.

We are proud that our IP agency "Dipl. Eng. Kostadin Tahtadjiev" is among the minority of the IP agencies in Bulgaria that has an EQE qualified European patent attorney practicing in Bulgaria and who is not listed under the "grandfather" clause, in the face of our partner M.Sc. Konstantin Tahtadjiev.

Practice areas

  • Trademarks
  • Designs
  • Patents
  • Litigation

Types of Services Offered

  • IP Counsel