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Google Patents indexes more than 87 million patents and patent applications with full text from 17 patent offices, including:
United States Patent and Trademark Office (USPTO), European Patent Office (EPO), China's National Intellectual Property Administration (CNIPA), Japan Patent Office (JPO), Korean Intellectual Property Office (KIPO),
World Intellectual Property Organization (WIPO), Deutsches Patent- und Markenamt (DPMA), Canadian Intellectual Property Office (CIPO), Russia, UK, France, Spain, Belgium, Denmark, Finland, Luxembourg, the Netherlands. These documents include the entire collection of granted patents and published patent applications from each database (which belong to the public domain). US patent documents date back to 1790, EPO and WIPO to 1978.[2] Optical character recognition (OCR) has been performed on the older US patents to make them searchable, and Google Translate has been used on all non-English patents to make the English translations searchable.
Google Patents also indexes documents from Google Scholar and Google Books, and has machine-classified them with Cooperative Patent Classification codes for searching.
Patent litigation information is also available in Google Patents through a partnership with Darts-ip, a global patent litigation database.
