Whether you’re starting your patent journey or are an experienced searcher, the following tools and learning resources will help you search for patents.
Search tools
Find resources and tools to search for patents.
Search strategy
Learn a strategy for conducting a preliminary U.S. patent search.
Get assistance
See USPTO programs that can help you learn about searching for patents.
Search our database of patents and patent application publications.
Browse through the weekly publication of patents issued that week.
Search for patent assignments and changes in ownership.
See Sequence Listings, tables, and other mega items for granted U.S. patents or published U.S. patent applications.
Extract open-source USPTO data.
Provides informative toolkits that give an overview of the intellectual property rights environment in various countries around the world.
International searches
These databases allow you to search applications in multiple patent offices simultaneously.
Dossier information of all applications that comprise a family that have been filed in participating IP offices
Up-to-date citation data relating to patent applications in the IP5 Offices
Full-text search of published international patent applications
A network of Europe's patent databases, with machine translation of European patents for some languages
Patent offices
Other international intellectual property offices that provide searchable patent databases
Henry E. Baker Public Search Facility
This facility in USPTO headquarters provides public access to patent information in a variety of formats.
Patent and Trademark Resource Centers (PTRCs)
These libraries across the country can provide resources and assistance for searching and IP protection.
Access free services
Browse other free USPTO services and programs that can help you in every step of the patent application process.