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Fundamentals · 3 min read
What Are Trademark Classes?
The USPTO doesn't register a trademark in the abstract. It registers it for specific goods or services, organized into 45 international classes.
Every trademark application has to specify which goods or services the mark will be used with, and those are grouped into one of 45 standardized international classes. For example, Class 25 covers clothing, Class 35 covers advertising and business services, and Class 41 covers education and entertainment services.
Your registration only protects your mark within the classes you filed in. A skincare brand and a software company could register the identical name without conflict, because they operate in entirely different classes.
Why this matters when you file
Choosing too narrow a class can leave real parts of your business unprotected. Choosing too many classes 'just in case' increases your filing fees for coverage you may not need. Getting this right is a strategic decision, not just a form field. It's usually the first place a rushed, template-based filing goes wrong.
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Related reading
What Is a Trademark?
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What Does a Trademark Actually Protect?
A trademark doesn't protect an idea, a product, or a business. It protects the identifier, and understanding the difference changes how you use it.
TM vs. SM vs. ®: What's the Difference?
Three symbols, three very different legal meanings. Only one of them requires a federal registration to use.