Europe's Network of Patent Databases (Esp@cenet) is a free service for accessing patent information. Four database files may be searched: (1)European Patents (most recent 24 months, with PDF files); (2) PCT(WO) patents (most recent 24 months, with PDF files); (3) worldwide patents (coverage depends on country, mostly back to 1960s or 1970s); and (4) Japanese patents (1976-present). Since 1970, each patent family in the collection has a representative document with a searchable English-language title and abstract.