Marek Lazewski > LDS Lazewski Depo & Partners > Warsaw, Poland > Lawyer Profile

LDS Lazewski Depo & Partners

Work Department

Patents, Trademarks, Unfair competition


Managing Partner at LDS Łazewski Depo & Partners, European patent attorney


Marek’s practice focuses particularly on complex patent litigation in the fields of pharma and biotechnology. In recent years he has managed litigation for several highly successful international pharmaceutical products. He has built an outstanding reputation in obtaining SPC for his clients. By combining his understanding of broad substantive law and CJEU rulings, his mastery of procedure and thorough understanding of the chemical and pharmaceutical technology, Marek and his team were able to liberalize the previously very restrictive SPC grant practice of the Polish Patent Office.

Additionally, Marek has been responsible for designing operations of now very successful Validation Department that manages patent portfolios for regional and global players. This process involved helping the team to establish procedures leading to the development of substantial know-how in the proceedings. Thanks to the consolidation of the practices, the team ensures safety to patent portfolios of the clients and they are pioneers in launching this innovative, the highest quality system on the Polish market. As a result each stage of the validation process is kept under control, providing quality and on-time delivery of tasks that are critical for our clients.

In addition to his litigation experience, Marek advises clients on trademark enforcement strategies and trademark infringement cases.


English, French


Throughout his career Marek has been an active member of numerous international IP associations, appearing at conferences, serving on committees and doing management work. Marek was:

– engaged in establishing the Polish branch of LES (Licensing Executives Society),
– a member of the management board of AIPPI Poland (the International Association for the Protection of    Intellectual Property),
– involved in forming a local provisional FICPI group (the International Federation of Intellectual Property Attorneys).

He was also involved in the activities of the Polish Patent Attorneys Bar as head of disciplinary prosecutors; currently serving on the Polish Patent Attorneys Bar supervisory board.

He was the first Polish member of EPLIT – the European Patent Litigators Association, currently Marek is a member of EPLIT.


Warsaw School of Economics (Master’s Degree in International Economics);
Warsaw University Law School and Jagiellonian University in Krakow;
Postgraduate Degree in Industrial Property Law;
Admitted in 1999 (European Patent Attorney from 2004);
Studied Management at IESE and INSEAD.


Boxing, horseback riding (showjumping).

Lawyer Rankings

Poland > Intellectual property

LDS Lazewski Depo & Partners is adept at handling patent and trademark litigation, as well as providing day-to-day advice to clients. Marek Lazewski is particularly strong in handling the IP management of pharmaceutical products as well as trademark enforcement strategies. Michal Siciarek is skilled in litigation concerning copyright and unfair competition.