Databases by subject: Patents

Major Indexes

espacenet

Find millions of patent documents from around the world that can help you understand whether a patent has been granted and if it is still in force.

Patentscope (WIPO)

Find patent documents, such as published international patent applications (according to the PCT).

Reaxys

Find substances and reactions, as well as citations and patents relating to chemistry.

SciFinder

Find substances, reactions, references, and patent information.

The Lens

Find nearly all patent documents in the world as open, annotatable digital public goods that are integrated with scholarly literature and other data.

U.S. Patents Full-Text and Image Database

Full-page images of all patents issued by the U.S. Patent & Trademark Office (USPTO) from 1790 - present. Full-text searching from 1976 - present.

Additional Indexes

Derwent Innovations Index

Find patents and citations of inventions in chemical, electrical, electronic, and mechanical engineering from 1963 to the present.

Ei Compendex

Find engineering information from Ei's databases, such as GEOBASE, Inspec, GeoRef, CBNB, and Chimica.

Materials Science & Engineering Database

Find content on materials science, metallurgy, ceramics, polymers, and composites used in engineering applications.

Mergent Archives

Mergent Archives is an online database providing you with access to a vast, indexed collection of corporate and industry related documents, including annual reports, key business ratios, D&B Country Reports, Million Dollar Directory volumes, Hoover's handbooks, a patent archive, and more.