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Advanced Google Search
Become a power searcher; learn search strategies, tools and tips.
Google Patents
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Google PatentsSearch for granted patents and applications from USPTO and translated patents from multiple international bodies. See About link for an updated list of countries. Also related non-patent literature. Filters are applied post-search.
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About Google PatentsTips on searching Google patents, including operators, using classifications and more.
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Cooperative Patent ClassificationHarmonized system used by USPTO and EPO for classifying patents.
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Advanced Google PatentsSelect criteria before searching for better results.
Searching Google Patents
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Google PatentsStart with a keyword search, and then filter your results.
The new Google Patents search tool (released in 2015) groups the results based on Cooperative Patent Classification (CPC) when Group by Classification filter in the header is selected. Click on ? to view other patents in this class.
You can add synonyms and search terms and also filter by date, assignee, inventor, patent office, language, filing status, citing patent and CPC class.
