Trademark Classes: The 45-Class Nice Classification Explained

When you register a trademark, you do not protect the mark for everything under the sun — you protect it for specific goods and services, organized into classes. Choosing the right class is one of the most consequential decisions in an application, because it defines the scope of your protection and drives the cost.

The Nice Classification: 45 classes

The USPTO, like most trademark offices worldwide, uses the international Nice Classification system. It divides all goods and services into 45 classes: Classes 1–34 cover goods (from chemicals and pharmaceuticals to clothing and furniture), and Classes 35–45 cover services (from advertising and financial services to legal and personal services).

Why classes matter

• Scope of protection. Your rights extend to the goods and services in the classes you register — not beyond. A mark registered for software (Class 9) does not automatically protect the same word used for a restaurant (Class 43).
• Cost. The USPTO charges its filing fee per class. Registering in three classes costs three times the per-class fee, so unnecessary classes waste money.
• Conflicts. A likelihood of confusion refusal usually arises from an earlier mark in the same or a closely related class.

How to choose the right class

Identify exactly what you sell or offer, then match it to the class that covers those goods or services. Two pitfalls to avoid: registering in too many classes (wasted fees on goods you don't actually offer) and too few (leaving key products unprotected). The USPTO's Trademark ID Manual lists pre-approved descriptions to help you land in the correct class.

Related vs. identical goods

Classes are an administrative tool, not the last word on conflicts. Confusion can be found between marks in different classes if the goods are commercially related, and two marks in the same class do not necessarily conflict. Classes structure the search and the fees, but the likelihood-of-confusion analysis looks at the actual goods.

Getting it right the first time

Class selection is set at filing and is difficult to expand later, so it pays to get it right before you submit. It is a core step in registering a trademark and a foundational topic in the Wysebridge trademark guide.