How to Search US Trademarks by Class: A Comprehensive Guide
When it comes to protecting your brand and securing a unique identity for your business, conducting a thorough trademark search is an essential step. This search enables you to check the availability of your proposed brand name, logo, or slogan, ensuring that no other similar trademark conflicts with it. In the United States, the USPTO (United States Patent and Trademark Office) maintains a database of registered and pending trademarks, which can be accessed through the Trademark Electronic Search System (TESS). However, navigating this vast database can be daunting, especially for those unfamiliar with the process. In this article, we will guide you on how to search US trademarks by class effectively, using the USPTO's searchable database.
Understanding Trademark Classes
Trademark classes, also known as the USPTO International Schedule of Classes for Goods & Services, are a system used to categorize goods and services for trademark registration purposes. This classification system is essential for organizing the vast array of trademarks, facilitating searches, and ensuring that applicants provide accurate and detailed descriptions of their goods and services. There are 45 classes, each representing a broad category of goods or services. For example, a clothing company would likely file within Class 25, while a restaurant would file under Class 43.
Using the USPTO's Searchable Database
To search US trademarks by class, you can use the USPTO's online database, which offers a user-friendly interface for searching trademarks. You can search by trademark name, number, or applicant class numbers. To conduct a search, follow these steps:
- Visit the USPTO's website and navigate to the Trademark Search page.
- Choose the Expert Search option to access advanced search features.
- Select the class or classes you want to search from the 45 available classes.
- Enter the trademark name, number, or applicant class numbers in the search field.
- Click on the "Search" button to retrieve the results.
Benefits of Searching Trademarks by Class

Conducting a thorough search of US trademarks by class offers several benefits, including:
- Identifying potential conflicts: A search by class helps you identify existing trademarks that may conflict with your proposed mark, reducing the risk of trademark infringement.
- Ensuring trademark availability: By searching trademarks by class, you can ensure that your proposed mark is available for registration and avoid costly rebranding or re-filing.
- Accurate classification: The USPTO's classification system is essential for accurate trademark registration. Searching by class ensures that your mark is classified correctly, reducing the risk of registration errors.
Tools and Resources
For those new to searching US trademarks by class, there are several tools and resources available to assist you:
- The USPTO's Trademark Electronic Search System (TESS) provides access to the USPTO's searchable database.
- The Trademark Search interface offers advanced search features and options for searching trademarks by class.
- The ClassACT (Classification Agentic Codification Tool) can immediately assign international classes to unclassified applications.
Conclusion
Searching US trademarks by class is an essential step in protecting your brand and ensuring trademark registration. By following the steps outlined in this article and utilizing the USPTO's searchable database, you can conduct a thorough search and avoid costly mistakes. Remember, accurate classification is crucial for successful trademark registration, and searching by class is a vital part of the process. With the tools and resources available, you can ensure that your trademark is unique, available, and accurately classified.