Home page of the United States Patent and Trademark Office's main web site.

Dec 20, 2025 · A powerful, flexible web-based patent search application that improves the overall patent searching process. It includes two user selected interfaces that provide enhanced access to prior art.

Oct 17, 2025 · Find existing patents, published patent applications and other published patent documentation

Dec 8, 2025 · Phone numbers, email addresses, and other contact information for USPTO offices and business centers

Query building guidance To start a quick lookup, enter a single patent or publication number and select the Search button. To start a basic search, select a search field, enter your search term, and select …

For assistance with Patent e-Filing, or to suggest improvements to the online system, or report technical problems, please call the Patent Electronic Business Center at:

Sep 16, 2012 · For general assistance in completing the patent forms below or to request paper copies of the forms, contact the USPTO Contact Center Division at 1-800-786-9199 (1-800-PTO-9199) or …

Access the Assignment Center to securely manage patent assignments and search for recorded assignment information.

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Aug 7, 2025 · Apply for a trademark through Trademark Center. Pay application-related fees and use the docketing feature to track the status of applications filed through Trademark Center.