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World Intellectual Property Organization
"The World Intellectual Property Organization (WIPO) is the United Nations agency dedicated to the use of intellectual property (patents, copyright, trademarks, designs, etc.) as a means of stimulating innovation and creativity."
* Full-text searching of over 73 million patent documents, including PCT and national/regional collections from more than 30 countries.
* AI-based developed-in translation tool.
* Cross-Lingual Information Retrieval (CLIR) functionality that finds synonyms search terms and translates everything into 13 languages.
Espacenet contains more than 70 million patent documents from approximately 90 countries and regional patent offices, plus more than 2 million non-patent literature references. Year coverage varies by country. The Espacenet search interface is available in a variety of languages. It also provides access to the INPADOC Legal Status and Patent Family information, and provides a Common Citation Document.
Common Citation Document
"The Common Citation Document (CCD) application aims to provide single-point access to citation data for the patent applications of the five IP offices (IP5). It consolidates the prior art cited by all participating offices for the family members of a patent application, thus enabling the search results for the same invention produced by several offices to be viewed on a single page."
The Lens (formerly PatentLens)
Covers 8 million worldwide patents and patent applications along with patent family information.