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Patent Links

The United States Patent and Trademark Office – Patents

The United States Patent and Trademark Office – Trademarks

The United States Copyright Office

To search patents, go to one or more of the following sites (different sites have different patents/applications/publications and different integrity issues):

 United States Patent & Trademark Office Patent Database

Free Patents Online

European Patent Office

 Google Patents

To search trademarks registered in the US Patent and Trademark Office, go here:

United States Patent and Trademark Office Office of Data Management

Patents for sale or to be licensed can be advertised at the following website:

United States Patent and Trademark Office of Data Management

Scroll down if necessary to the “Listing Patents for Sale or License in the Official Gazette (OG)”