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Combine with AND, OR, NOT; group with brackets; quote phrases; dates like PD>=2020 or AD=2018..2021. Ctrl+Enter to search.

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CNIPA patent search in English

Search Chinese patent publications by number, applicant or English keywords. CNIPA.AI is an independent service, not the official patent office.

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The initial list includes multiple jurisdictions. Select China · CN and check each source’s coverage before comparing results.

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Use Advanced Filters → Patent Number. Keep the CN prefix and final kind code exactly as published. Record the application number separately.
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Use the name recorded on the publication. Search Chinese names and spelling variants separately; a brand or group may contain several legal applicants.
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Start with specific technical terms. For supported sources and languages, AI-assisted search may translate the query; record the wording shown and compare relevant passages with the original Chinese publication.
Download search log (.md)Step-by-step guide · Patent TaskBrowse recorded applicant namesExplore company patent portfolios

For US and European documents, explore Patent Task search.

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About this serviceCNIPA.AI is an independently operated patent assistance tool, not the official website of the China National Intellectual Property Administration. Patent data comes from public databases and may be incomplete. Drafts and drawings are intended for professional review and refinement.

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