Resources that are freely accessible to researchers from anywhere in the world. No library affiliation or subscriptions are required to access the full text.
Free tool from WIPO. Allows researchers to simultaneously search across multiple countries' patent collections. Some results will link out to full-text, depending on availability.
Provides access to worldwide patent information. Patents by member states of the European Patent Office and the World Intellectual Property Organization are included. Years of coverage and availability of full text and images vary by country.
This is a free website that will allow you to enter a U.S. patent number and retrieve a PDF version of the patent. The documents are drawn from the USPTO file server and it does not require any special software to view the images.
Contains links to the various databases of the Patent and Trademark Office. Provides full-text of patents from 1976 to the present and full-page images for patents starting in 1790. Requires a TIFF plug-in to download page images.
A searchable database of patent information resulting from DOE-sponsored research and development (R&D). Included are patents that DOE sponsored through a variety of funding mechanisms, including grants, contracts, or cooperative agreements. Use search box to the left to do a basic search or click on the above link to go to the website and use advanced search.
= Websites where everything in the site is free, full-text.
