United States Patent and Trademark Office

An Agency of the United States Department of Commerce, the USPTO offers an IP database, education, policies and procedures, and reports pertaining to patent filings.
The USPTO site can retrieve the status of your patent application.
Search the USPTO database for issued and filed or pending patents and applications.
This site offers patent assignment information for issued patents and published applications.
The Trademark Electronic Search System offers online searching of existing trademark application and registration information. It provides public access to the same text and image database of trademarks that is currently provided to examining attorneys at the USPTO.
This is the USPTO Trademark Application and Registration Retrieval system. From this page, you can retrieve information about pending and registered trademarks obtained from the USPTO’s internal database by simply entering a valid trademark serial number or registration number.