Trademark Litigation: Legal Key Points, Examples, and Recommendations for Businesses

Date
December 4, 2025

In an increasingly competitive and globalized market, brands not only identify products or services, but also embody reputation, trust, and commercial value. When disputes arise over the use of a brand, the outcome of litigation can directly impact a company’s viability and reputation.

In this article, we review what trademark disputes are, why they occur, some examples of real-life cases, and what steps can be taken to prevent them.

What are trademark disputes?

A trademark dispute is a judicial or administrative proceeding that arises when there is a conflict over the use, registration, or protection of a trademark. These proceedings may be brought before national, European, or international courts, depending on the scope of the dispute.

Generally, trademark disputes center on issues such as:

  • Infringement: unauthorized use of a trademark by a third party.
  • Invalidity: challenging a trademark registration on the grounds that it does not meet the legal requirements.
  • Expiration: loss of rights due to nonuse, public domain status, or other causes.
  • Unfair competition: the use of distinctive signs that cause confusion in the marketplace.

These lawsuits are significant for two reasons: first, they protect the trademark owner, and second, they help ensure a fair and transparent market for consumers.

Main Reasons for Trademark Disputes

Trademark disputes have various causes, although they tend to center on the following:

1. Similarity between distinctive signs

This is one of the most common reasons. When two trademarks share graphic, phonetic, or conceptual similarities, it can lead to consumer confusion.

2. Unauthorized use of a well-known or renowned trademark

Well-known trademarks enjoy enhanced protection. Unauthorized use by third parties, even in different industries, may lead to litigation.

3. Registrations in bad faith

There are cases in which a person or company registers a trademark with the intention of blocking or taking advantage of another party's reputation, leading to legal disputes.

4. International Conflicts

In a globalized world, many companies expand into new markets and encounter prior registrations or conflicting uses in other jurisdictions.

Examples of actual court rulings in trademark litigation cases

An analysis of case law provides insights into how courts interpret trademark rights. Below, we will summarize some representative cases:

The María Callas Case: Reputation Alone Is Not Enough Without a Connection to Specific Products

One example of a trademark dispute is the case involving the name of María Callas, the famous Greek soprano. The artist’s heirs attempted to block the registration of a figurative trademark with the EUIPO that included her name, for goods in Class 16 (stationery).

The opposition was based on three main arguments:

  • Ownership of an earlier word trademark registered in the European Union under the name “María Callas.”
  • Prior commercial use of the name in various markets.
  • The well-known reputation of the name "María Callas" in the EU, which, according to opponents, warranted enhanced protection.

However, the EUIPO Opposition Division rejected the claim for several compelling reasons:

  • No likelihood of confusion: The goods in question (stationery) were unrelated to the sectors in which prior use of the name had been established.
  • Insufficient evidence of reputation in Class 16: It was not demonstrated that the public associated the name “María Callas” with stationery, nor that such use was detrimental to the trademark.
  • Formal deficiencies in the opposition: some of the documentation was submitted in Greek without the corresponding English translation, which weakened the claim.

This case is a clear example of how the fame of a person or a distinctive sign is not, on its own, sufficient to block registrations for all classes of goods or services. To succeed in an opposition proceeding, it is essential to demonstrate a genuine and specific connection between the trademark and the goods or services in question, as well as an actual likelihood of confusion or unfair advantage.

The Choco Flakes Case: Trademark Infringement and Unfair Competition in the Food Industry

Another example in the area of trademark litigation is the dispute between Cuétara and Gullón over the use of similar packaging in the marketing of cookies.

In this case, Cuétara sued Gullón for unfair competition, arguing that the marketing of the “Choco Cereales” cookies improperly imitated both the figurative trademark “Choco Flakes” and the packaging Cuétara used to distinguish its products. These trademarks were duly registered with the OEPM and the EUIPO.

The case reached the Provincial Court of Alicante, which acts as the European Union Trademark Court. The ruling confirmed the infringement of Cuétara’s rights and established several key points:

  • Proven reputation: The court recognized that Cuétara’s trademarks were well-known in the cookie and cereal industry, which strengthens the level of protection against third parties.
  • Similarity of the packaging: Both featured an identical product (cookies dipped in milk in a bowl), accompanied by children's characters in a similar style—elements that created a similar perception among consumers.
  • Association among the relevant public: Despite certain graphical differences, the court found that the public would associate Gullón’s trademarks with those of Cuétara, given the visual and conceptual similarity of the packaging.
  • Unfair exploitation: The ruling concluded that Gullón was benefiting from the prestige and reputation of Cuétara’s trademarks, constituting a clear case of trademark parasitism.

Consequently, the ruling determined that:

  • The use of the Choco Cereales packaging infringed both the Spanish trademarks and the European Union trademarks owned by Cuétara.
  • Gullón was required to remove the non-compliant packaging from the market and destroy it, as well as to refrain from using it again.

This case is a good example of how the courts protect not only the trademark itself, but also the combination of graphic and commercial elements that could mislead consumers, especially in mass-market sectors such as the food industry.

Preventive Recommendations to Avoid Trademark Disputes

Although legal action is an essential tool for defending trademark rights, it is best to minimize risks before a dispute arises. Some key recommendations are:

  1. Pre-registration searches: Before applying for a trademark, it is advisable to conduct thorough searches to avoid conflicts with existing registrations.
  2. Global Protection Strategy: Companies with international operations should develop a trademark registration plan tailored to their target markets.
  3. Active trademark monitoring: There are monitoring services that alert you to applications for similar trademarks, allowing you to respond in a timely manner.
  4. Proper Contract Management: Clearly define ownership and use of trademarks in franchise, distribution, licensing, or joint venture agreements.
  5. Effective use of the trademark: Maintain actual and documented use to avoid cancellation proceedings due to nonuse.

The Importance of Specialized Advice

Trademark litigation highlights the strategic value of distinctive marks and the need to proactively protect them. Preventing disputes through an effective trademark strategy and, if necessary, defending one’s rights in court are essential for any company that wants to safeguard its competitiveness.

María Cadarso, Senior Associate in the Legal (Litigation) Department at Elzaburu