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.
Search publicly available research documents, including technical reports, from the U.S. Department of Energy's Office of Scientific and Technical Information.