Patent databases

Patent databases for free

Google Patents includes over 87 million patent publications from 17 worldwide patent offices, as well as many more technical documents and books indexed in Google Scholar and Google Books.

The United States Patent Office (USPTO) offers two patent key databases. USPTO for approved patents (full-text from 1976 onwards, images from 1790 to present) and USPTO for patents still at application status.

WIPO Patentscope from the World Interllectual Property Organization enables the search for patents in national and international collections.

DEPATISnet is the database of the German Patent and Trade Mark Office (Deutsches Patent- und Markenamt) for online searches on patent publications from around the world. It includes the internal DEPATIS electronic document archive of the office (German patent information system).

For further (international) patent databases please use the list from the IVS-CPT.