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Use the TRAIL search tool to find and access digital versions of U.S. technical reports published prior to 1975.
Science.gov is a search engine providing access to millions of pages of scientific information provided by federal agencies.
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This physical science and technology laboratory is a branch of the U.S. Department of Commerce and publishes standards and technical reports.
The Patents Publication Enquiry Service covers all GB applications published and granted after 3 January 2007 and all GB corrected documents published after 1 April 2010.
Espacenet offers free access to more than 70 million patent documents worldwide, containing information about inventions and technical developments from 1836 to today.
Esp@cenet - worldwide database includes full collection of published patent applications from 80+ countries around the world.
Patent Cooperation Treaty - WIPO provides access to database of published international patent applications.
Searches archives of full-text patents issued since 1976 and full-page images of patents issued since 1790. Published applications are available since 15 March 2001.
A free patent search tool, including 80 million patent documents from the European Patent Office, the USPTO, and other countries worldwide, searchable by full text.
A patent search database including records from patent offices worldwide. It also allows searching of gene sequences.