Patent Databases

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• CAMBIA Patent Lens
  Coverage: EP, AU, US, WO
  Other Features: INPADOC
  Read: Searching for Patents
• ESP@CENET
  Coverage: EP, WO, Worldwide
  Other Features: INPADOC
• WIPO's PatentScope
  Coverage: WO

U.S. Patent Collection

• USPTO - PatFT and AppFT
• FreshPatents
  no affiliation with the USPTO; free patent keyword monitoring
• Google Patents
  uses Google Book Search
• Patent Storm

Other National Patent Collections

• Australia - AusPat
• Canada
  contains patent documents from 1869 to present
• China
• Czech Republic
• Finland
• France
• Germany
• Hungary
• India
• Ireland
• Japan
• Latin America
• New Zealand
• Republic of Korea
• Russian Federation
• United Kingdom