The official website of the United States Patent and Trademark Office. Full-text available since 1976, full-page images since 1790. Full text of an entire patent can be printed without images. Original full page images may be printed (use print icon on menu bar within the page and not from the File menu in browser) only one page at a time-- TIFF viewer, available on the site, needs to be downloaded for viewing. Site includes patent applications published since 15 March 2001. All information on this site is provided free of charge to the public.