Understanding Trademark Opposition

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As a brand enters the market, a similar trademark application by another business can create a conflict.

For these brands, similar trademark applications are not just a coincidence, but a threat to the brand. In particular, if the name has already been built up in the market, the application of others similar to that name can lead to trademark confusion and even real damage such as declining consumer trust and damaging brand value.

So how do we respond?

The trademark opposition system allows you to proactively defend your trademark registration for our brand against these threats.

A trademark opposition is a scheme that prevents third parties from registering a trademark application, claiming that the application is grounds for refusal.

Trademark opposition enables a third party to challenge a published application before registration. It supplements examination by bringing relevant legal grounds and evidence to the office's attention.

The trademark complaint is a “legal defense line” to protect our rights. In particular, if you have a similar trademark that is confused with our brand after it has been filed, you will need to actively utilize the opposition system.

Suppose you operate 'Raon Coffee,' have built local goodwill and regular customers, and have applied to register the name as a trademark.

One day, however, I discovered that someone had filed a similar trademark called “Raoncaffe” after the date I applied for the trademark. Furthermore, what if you have a competitor who uses the name in real-life store operations and sells it under the brand “Raon Cafe”?

Customers can easily confuse ‘Raon Coffee’ with ‘Raon Cafe’. Especially in an environment like online search, delivery apps, social media, and map services, when brand names are similar, source confusion occurs naturally.

This confusion does not end with a simple illusion. 

It can lead to a decline in brand trust, a weakening of customer loyalty, a break-up of existing customers, and a loss of marketing costs. When a consumer mistakenly visits or orders a Raon Cafe, it actually takes the customer away from where they are not my brand.

This is a situation where brand assets, created with time and money, are flowing into the competition.

A lot of people think so here.

Right. First of all, it’s clearly a favorable position.

However, registration is not automatically denied. Since trademark examination is an administrative process conducted by a person, there are cases in which similar trademarks are registered for reasons such as differences in similarity, missing prior trademark searches, and differences in product range.

Therefore, it can be dangerous to say “it’s okay” first.

So, what if you didn’t make any objections and eventually the ‘Raon Cafe’ became a trademark?

In this case, the “Raon Cafe” will be a valid registered trademark. In other words, simply because you have a legally protected right and are similar, it becomes difficult to demand that you stop using it right away. 

Post-registration remedies may still be available, including invalidation proceedings or appropriate infringement claims. These can, however, involve greater time and cost. 

Responding after registration may therefore be possible, but more burdensome.

This highlights the importance of trademark opposition.Opposition is a Procedure to prevent the registration of a similar trademark by raising the issue before it is registered.

This means that it is not as complex as invalidation procedures, it is not as expensive as lawsuits, and it can respond quickly before registration. 

In summary, Blocking before registration is more efficient than after registration.

A trademark opposition is a relatively simple process, but it is important to understand the procedure correctly because if you miss it, it cannot be undone. The application process is carried out in five steps.

1 Application submission

Anyone may oppose a published Korean trademark application. For publications on or after 22 July 2025, the deadline is 30 days from publication. The notice identifies the opponent, any representative, the application challenged, the grounds, and supporting evidence. 

The official opposition fee is KRW 50,000 per class. Professional fees may apply separately.

4. Examination of the opposition

A panel of three examiners considers the opposition. The panel may examine additional grounds where authorized, after giving the parties an opportunity to respond. Related oppositions may be consolidated or separated as appropriate.

If the applicant does not respond, the office may decide the matter on the available record. Failure to respond does not itself prove that every opposition ground is valid; the grounds and evidence still require assessment.

5. Decision on the opposition

The panel assesses the opposition and issues a written decision. Failure to provide required grounds or evidence can lead to dismissal. If the opposition is well-founded, the application may be refused for the affected goods.

Brands are not just names, they are trust with consumers and corporate assets. The trademark opposition serves as a 'defense wall' to protect the brand, and a strategic approach from experts is needed to make good use of it.

An opposition is not just a writing process, it is a process that requires both a legal basis and a strategy.