Patent databases

Canadian, U.S., and international patent databases can provide a useful tool in the early stages of establishing a patent. Some databases include:

• U.S. patent database
  Searchable U.S. patent database
• Patent Cooperation Treaty (PCT) Office patent database
  Searchable PCT patent database
• Canadian patent database
  Searchable Canadian patent database
• European patent database
  Searchable European patent database
• Delphion patent search engine
  U.S. and Patent Cooperation Treaty patent search engine