Intellectual property (IP) is all around us. No matter the nature of your business, you will be frequently using and creating intellectual property. We are dedicated to guiding and assisting you every step of the way, from conception and creation to placement of the final product on the market.


Tsimikalis Kalonarou delivers expertise in IP strategy, clearance searches, enforcement work, trade mark infringements and related disputes. It also frequently handles the registration of trade marks and patents, domestically and internationally, with bodies including the EUIPO, EPO and WIPO. Athanasios Tsimikalis and Chariklia Kalonarou head up the practice. Clients single out Stefanos Tsimikalis for his ‘indispensable advice and phenomenal business acumen‘”.

The Legal 500 - The Clients Guide to Law Firms

Tsimikalis Kalonarou’s lawyers “know IP laws inside out“, are “committed to their clients’ best interests“, and provide “best-in-class advice“. The “brilliant” Stefanos Tsimikalis is “an excellent trademark expert” and Athanasios Tsimikalis is praised for his “extremely in-depth knowledge of the intellectual property system“.


The field of intellectual and industrial property has been at the forefront of the sweeping changes brought about by globalisation and the rapid spread of new technologies and media. At the same time, the significant intangible value that trademarks, patents and designs represent for companies remains undiminished. It is now widely acknowledged that the safeguarding of intangible assets – whether by patenting inventions or registering trademarks – has become an essential part of any organisation’s strategy.


At Tsimikalis Kalonarou we attach great importance to intellectual and industrial property rights, which have always been a substantial part of our work. This is perhaps most clearly illustrated by our long-standing track record. Since the 1950s, we have represented and handled our clients’ interests in this field in a consistent and dedicated manner. Our IP department was in fact created not long after World War II, when the firm was instructed to recover foreign trademarks that had been expropriated as hostile property. Our efforts at the time resulted in a successful outcome and the generating of new business for the firm.


Our firm is committed to supporting clients by protecting their IP, regardless of type (e.g. innovative ideas, inventions, trademarks, copyright protected work). Our services range from the submission of applications to register trademarks, patents on inventions and designs, either domestically or internationally (EUIPO, EPO, WIPO, etc.) to handling multi-jurisdictional, complex litigations against infringers. Our decades-long engagement in these fields has enabled us to create an IP portfolio that we manage for major multinationals across a diverse range of industries.


Tsimikalis Kalonarou understands the value of trademarks, fully aware that in some cases they may be a company’s most valuable asset. Accordingly, our services extend from managing trademark portfolios to the registration and legal protection of trademarks. The services we provide include:

  • Brand portfolio development
  • Searches to evaluate the restorability of new applications
  • Application of national trademarks, EUTMs and International Registrations
  • Opposition and cancellation work
  • Administration and monitoring of trademark portfolios
  • Advising on licensing, merchandising, franchising, joint venture and co-existence agreements.
  • Enforcement and infringement proceedings

Though not particularly common in Greece, even to the point of neglect, industrial designs are a reliable option for protecting the two- or three-dimensional form of a product and its distinctive characteristics. Especially in view of the widespread importation of imitations into Greece, industrial design rights can provide effective protection in many business sectors.

With many years of experience in registering and managing these rights at national, European and international level, our firm engages in:

  • Clearance searches on local and regional levels
  • Registration of registered designs, filing and defending opposition, invalidity and revocation proceedings
  • Enforcement litigation
  • advising on all forms of transactions affecting designs
  • Advising on ownership and exploitation of designs

A company’s ability to obtain patents ensures a return on its research investment. In our view, an important factor for the normal use and exploitation of a patent is not simply its proper registration, but also its consistent upholding by the courts. In this regard, our firm is active from the stage of filing a patent through to the successful judicial enforcement of the right deriving from it.

The services we provide include:

  • Applying for national and European patents
  • Validations of European Patents
  • Drafting license agreements
  • Annuities payments
  • Advising on contracts to transfer technology
  • Support in respect of biotechnological inventions and certificates of plant creations
  • Conducting patent litigation
  • Opinions on patent validity and infringement

The advent of domain names has created a rapidly expanding area of law with enormous importance in terms of how businesses approach consumers. The interplay between domain names and trademarks frequently gives rise to conflicts on account of the different legal frameworks governing each of these rights. So, in this field too, our firm constantly keeps abreast of international developments so that we can provide the best possible advice to clients.

In particular, we engage in:

  • Registration and management of domain names
  • Representation of domain name owners before the national supervising authority (EETT) and local courts
  • Drafting concession documents
  • Dealing with cybersquatters

The ultimate goal of any financially motivated enterprise is to attract the consumer. To achieve this, unfair practices are often adopted, such as appropriating the fame of another’s distinctive features. Our mission is to protect clients who have distinctive features that are not registered but have become established in the market.

We handle, among other things:

  • Securing protection for distinctive features such as a brand name and distinctive titles
  • Taking action against boycotts and discriminatory treatments
  • Taking action against the canvassing of customers
  • Comparable, unfair and misleading advertising.
  • Legal support during the conception and execution of advertising campaigns

To protect our clients’ interests in the most effective manner possible against the illegal importation of imitation products and the unlicensed use of protected marks, we liaise with the authorities to help ensure that reliable customs checks are conducted on products of doubtful origin. Apart from the customs service, we also maintain contact with the Market Police, the Municipal Police and the tax authorities, so that we can be promptly informed and, after consulting with the client, take steps to have any counterfeit goods seized or destroyed.


Trade secrets are extremely valuable assets and an effective way to protect practices, methods, business information or recipes which foster innovation or simply provide a competitive advantage. We can help you safeguard the integrity of your trade and business information and assist you in dealing with insider threats and unfair competition.

Understanding your concerns and effectively protecting your ideas in an ever evolving marketplace.

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