International Class Search US Patent Office: A Comprehensive Guide
The United States Patent and Trademark Office (USPTO) Public Search Facility located in Alexandria, VA provides the public access to patent and trademark information in a variety of formats, including online, microfilm, and print. One of the key features of this search facility is the ability to search the International Class database, which includes about 2 million International Applications. This search facility features flexible search syntax, automatic word stemming and relevance ranking, as well as graphical results.
Understanding International Class Search
An International Class search is a type of patent search that allows users to search for patents and patent applications in a specific class or group of classes. The International Class system is a hierarchical system of language-independent symbols for the classification of patents and utility models according to different areas of technology. The system is used by the World Intellectual Property Organization (WIPO) and is administered by the Strasbourg Agreement (1971).
There are currently 45 International Classes, each representing a different area of technology. Classes are further sub-divided into sub-classes, groups, and sub-groups, providing a more detailed and precise way to search for patents. For example, International Class 12 includes all goods related to transportation, while International Class 26 includes all goods related to clothing and textiles.
The Cooperative Patent Classification (CPC)

Moving forward, it's essential to keep these visual contexts in mind when discussing International Class Search Us Patent Office.
CPC is used by the USPTO and the EPO, and other countries may also move to this system in the future. CPC is based on the IPC system but features many more sub-categories for more precise searching. The CPC Search Tool allows users to search for patents and patent applications in a specific CPC class or group of classes.
Benefits of International Class Search
An International Class search provides a number of benefits for users, including:
- Improved precision: International Class search allows users to search for patents in a specific class or group of classes, providing more precise results.
- Increased efficiency: International Class search allows users to search for patents in a single interface, reducing the time and effort required to search for patents.
- Better understanding of technology: International Class search allows users to understand the different areas of technology and the patents that relate to those areas.
Resources for International Class Search

There are a number of resources available for International Class search, including:
- USPTO Public Search Facility: Provides access to patent and trademark information in a variety of formats, including online, microfilm, and print.
- CPC Search Tool: Allows users to search for patents and patent applications in a specific CPC class or group of classes.
- WIPO: Provides access to the International Class database and allows users to search for patents in a specific class or group of classes.
Conclusion
International Class search is a powerful tool for patent search and analysis. It allows users to search for patents in a specific class or group of classes, providing more precise results and improving the efficiency of patent search. The USPTO Public Search Facility, CPC Search Tool, and WIPO provide access to the International Class database and allow users to search for patents in a specific class or group of classes. By understanding International Class search, users can better navigate the patent landscape and make more informed decisions about patent search and analysis.