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China Intellectual Property Net (CNIPR) is a platform for Chinese patent searching, monitoring, document translation, document delivery, and Chinese Pharmaceutical patent searches, maintained by the Intellectual Property Publishing House (IPPH).[1] The free Chinese patent search platform C-Pat is no longer available through CNIPR, but users can subscribe to an English-language version of CNIPR.[2] See this page on the English version of the CNIPR website for pricing information.

Free Chinese-Language Patent Search

Users can still search for Chinese patent documents on the Chinese-language version of the CNIPR website for free. The EPO provides a step-by-step guide on retrieving Chinese documents from IPPH/SIPO's CNIPR database. A fielded search form (in Chinese) allows users to search for Chinese patents, utility models, designs, granted patents, TW patents, and HK patents (as of September 2012, additional authority coverage appears to be available). [3] The full record displays bibliographic data, abstract, main claim, legal status, citations, patent family, and automated abstract/keywords.[3] The EPO guide indicates that users can download the document in TIFF format, when available.[3]


  1. "About Us." CNIPR website, Accessed September 4, 2012.
  2. "CNIPR Search." CNIPR website, Accessed September 4, 2012.
  3. 3.0 3.1 3.2 "Retrieving Chinese documents from IPPH/SIPO's CNIPR database." EPO website,$File/cnipr_document_retrieval_chinese_201203.pdf. Accessed September 4, 2012.

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