Trademark Guide / Classes and Designated Goods

The same brand can have different protection depending on its designated goods

A shield and arrow representing trademark protection

A trademark registration does not give you a monopoly over the name across every industry and product. Protection is defined primarily by the goods and services designated in the application.

Deciding which goods and services to protect is therefore as important as choosing the brand name.

To understand this process, it helps to distinguish , , and .

What are classes, designated goods, and similarity group codes?

Classes: broad categories of goods and services

The international classification places goods in 1-34 and services in Classes 35-45. Classes determine the basic classification and per-class filing fees, but a class number alone does not define the scope of protection.

Designated goods: what the application actually covers

Even within one class, the scope of rights varies with the specific goods designated. This is why both your current business and concrete expansion plans need to be considered.

Similarity group codes: an important reference for assessing conflicts

In Korean trademark examination, are assigned with regard to the nature of goods and services and commercial practices. They are a key reference when comparing with earlier applications and registrations.

Why similarity group codes matter

Suppose you find an similar to yours.

The fact that it is registered in a different class does not eliminate the risk of conflict. Goods and services in different may share a .

Conversely, goods within the same class may be assessed differently depending on their nature and commercial relationship.

An earlier-mark search should therefore examine and similarity group codes as well as class numbers.

A similarity group code does not itself define the entire legal scope of a right. The final assessment may differ according to the actual relationship between the goods or services and commercial practices.

How does your business affect the filing scope?

For example, preparing and serving drinks in a cafe and selling packaged coffee as a separate branded product may require different and .

The same applies to clothing brands. Protecting a mark on your own clothing and protecting a mark used for a separate retail service require distinct consideration. Selling online does not mean every business needs the same set of classes.

What matters is which goods or services the mark actually identifies, rather than the industry label the business has chosen.

Is it better to file in as many classes as possible?

Not necessarily.

More increase filing costs and may broaden the range of that must be reviewed. A scope that is too narrow, however, may leave essential parts of your business unprotected.

A sensible approach distinguishes your core business from specific expansion plans and weighs the importance and registration risks of each area.

OWNB develops the proposed classes and from your business description, cross-checks and earlier marks, and presents the recommended scope in a report.

Can you add new goods after registration?

You cannot freely edit an existing registration to add goods. Depending on the statutory requirements, an application to register additional or a separate trademark application may be considered.

The new scope still requires examination. It is therefore worth carefully reviewing essential business coverage at the initial filing stage.

Information as of 2026.10.11
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Sunrich International Patent & Law Firm · Principal Patent Attorney Yoon Bae Kim