WIPO's webportal for information about patenta. Using PatentScope you can search among more than a million published PCT applications, read the specifications and study documents online. PatentScope also includes general information on patents, statistics, news and much more.
U.S. patents in full text from 1790 onwards. Searchable in full text from 1976 onwards. In addition to approved patents this database includes patent applications from 2001 onwards. Most of UPSTO's material can be searched for with the more user friendly Google Patents above.