With its worldwide coverage and simple search features, Espacenet, database of EPO European Patent Office, offers free access to information about inventions and technical developments from 1836 to today.
Espacenet is accessible to beginners and experts and is updated daily. It contains data on more than 95 million patent documents from around the world. Supporting information can help you understand whether a patent has been granted and if it is still in force.

Offers a high-quality, interdisciplinary archive to support scholarship and teaching. Includes archives of over 1,000 leading academic journals across the humanities, social sciences, and sciences, as well as select monographs and other materials valuable for academic work. The entire corpus is full-text searchable, offers search term highlighting, includes high-quality images, and is interlinked by millions of citations and references.

The archive is unique in terms of scale, content, and the significant use it receives. It is recognized specifically for:

Journal Citation Reports (JCR) is a comprehensive resource that allows you to evaluate and compare journals using citation data from over 7,500 scholarly and technical journals. It is the only source of citation data on journals, and includes virtually all areas of science, technology, and social sciences.

Use JCR to find:

Scopus is the largest abstract and citation database of peer-reviewed literature: scientific journals, books and conference proceedings. Delivering a comprehensive overview of the world's research output in the fields of science, technology, medicine, social sciences, and arts and humanities, Scopus features smart tools to track, analyze and visualize research.

As research becomes increasingly global, interdisciplinary and collaborative, you can make sure that critical research from around the world is not missed when you choose Scopus.

ChemSpider is a free chemical structure database providing fast access to over 30 million structures, properties and associated information. By integrating and linking compounds from more than 470 data sources, ChemSpider enables researchers to discover the most comprehensive view of freely available chemical data from a single online search. It is owned by the Royal Society of Chemistry.