- Research starting point Link
Publication coverage: 1800s - present (varies by country; updated weekly)The largest public patent database on the internet, Espacenet contains more than 100 million patent documents from more than 90 countries including Canada and the U.S., plus 2 million records for non-patent literature cited in EPO search reports.
Publication coverage: 1947 - presentThis web portal, formerly known as SciTech Connect, contains more than 3 million references (445,000 full-text) to reports, articles, patents, datasets, presentations, software, and other scientific and technical information arising from research supported by the U.S. Department of Energy.
Publication coverage: Varies by publication.A collection of 50 reference titles published by Oxford University Press. Includes dictionaries and encyclopedias (with over 210,000 entries) in the science and engineering disciplines.