Google Patents provides access to United States patents from the 1790s to the present. It also includes patents from around the world that have been translated. Searchers can easily download the pdf of a patent found in the database.
Abstracts and citations of peer-reviewed literature covering the fields of science, technology, medicine, social sciences, arts, and humanities from 1960 to the present.
United States Patents. The full-text of patents are available free of charge. The database can be searched using any number of fields, including keyword, title, patent number, applicant name, and assignee name.