Home page of the United States Patent and Trademark Office's main web site.
The Patent Public Search tool is a web-based search application for patents and patent application publications. Patent Public Search has two user-selectable modern interfaces that provide enhanced access to prior art. The new, powerful, and flexible capabilities of the application will improve the overall patent searching process.
Search for a patent application Search by application number, patent number, PCT number, publication number or international design registration number.
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Search and read the full text of patents from around the world with Google Patents, and find prior art in our index of non-patent literature.
