中華民國智慧財產局
中國知識產權局專利檢索
世界知識產權組織
世界知識產權組織 IPDL: (The Intellectual Property Digital Library)
美國專利局
美國專利局 FullText
歐洲專利局
http://www.ipaustralia.gov.au/(Australia)
http://www.european-patent-office.org/patlib/country/belgium(Belgium)
http://www.bdt.org.br/bdt/inpi (Brazil)
http://info.ic.gc.ca/opengov/cipo (Canada) ? dead link
http://www.ige.ch/ (Cuba)
http://www.dkpto.dk/ (Denmark)
http://www.derwent.com (Derwent)
http://www.prh.fi/ (Finland)
http://www.inpi.fr/ (France)
http://www.deutsches-patentamt.de/ (Germany)
http://www.epo.co.at/epo/patlib/country/greece/index.htm (Greece)
http://www.hpo.hu/ (Hungary)
http://www.hpo.hu/ (Iceland)
http://www.patent.go.id/ (Indonesia)
http://www.european-patent-office.org/it/ (Italy)
http://www.jpo-miti.go.jp/(Japan)
http://www.kipo.go.kr/ (Korea)
http://www.govt.nz/ps/min/com/patent (New Zealand)
http://satum.ci.uw.edu.pl/up (Poland)
http://www.inpi.pt/ (Portugal)
http://www.osim.ro/ (Romania)
http://www.gov.sg/molaw/rtmp (Singapore)
http://www.eunet.es/InterStand/patentes/index.html (Spain)
http://www.prv.se/prveng/front.htm (Sweden)
http://www.ige.ch/ (Switzerland)
http://www.patent.gov.uk/ (United Kingdom)
http://www.delphion.com/research/ (US IBM)
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