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| No. | Patent databases | Information available | Search function | Advantages |
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| 1 | CNIPA | The CNIPA owns all kinds of patent documents of more than 90 patent agencies and nearly half of patent specifications issued by patent agencies. China has announced more than 50000 patents. China has announced over 50000 patents | Search function field search, IPC category navigation search | It provides Chinese patent machine translation service with comprehensive information and fast and accurate retrieval information. |
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| 2 | EPO | Espacenet contains more than 90 million files of various countries; the global patent index (GPI), as a complementary tool of Espacenet, is used to search global patents | Quick query, advanced search, number search, category search | It provides browsing options for the search function of CPC; compared with other patent search systems, it is a unique function. It provides patent legal status information directly linked to patent public reference documents and provides complete machine translation to translate patent documents. |
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| 3 | WIPO | PATENTSCOPE contents include PCT electronic bulletin, Madrid application trademark database, US, Canada, European patent database, and Jopal technology journal database | Simple search, advanced search, by file combination, advanced cross language query | The search results are sorted by relevance for easy reference; support machine translation; provide legal information query; can be linked to the main databases of patents in the world. It provides full-paper search capabilities. There is no limit to the number of patent search results. |
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| 4 | USPTO | The database is updated every Tuesday, providing a full-text image description of the film since 90 years and a full-text text description since 1976 | Quick query, advanced search, official account query, fixed title query, number retrieval, picture retrieval | Complete database resources; access to patent information is very convenient, providing a rich information service platform, all-round service for innovation of small and medium-sized enterprises. |
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| 5 | JPO | J-PlatPat publishes detailed information about the status of the whole process of patent application (e.g., examination and grant) and information publicity; PAJ (patent abstract of Japan) can also search for information | Quick search, joint search, multiple fields for category number or keyword search | Early Japanese patent documents are included completely, with huge data advantages and convenient retrieval methods. Patent texts included on the platform have basically been converted into text format and full-text application search fields; browsing interface can provide highlighting function, etc. |
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| 6 | KIPO | KIPRIS provides patent (including patent and utility model) search, design search, trademark search, kPa search, Korean English machine translation, and other services. It updates data every day | Basic search, intelligent search, advanced search | Viewing the full text, legal status, priority, race, and other information, providing Korean patent summary translation, linking to domestic and foreign online patent databases, etc. |
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| 7 | UK-IPO | Check the patent status to get the latest information about the patent application in the UK. Search for published patent applications and registered UK patents | Ipsum search methods include publication number, Espacenet, patent classification, and review date | Providing a variety of search paths and search systems and searching a comprehensive range. In addition, three kinds of patent information retrieval systems are provided, which can be retrieved through the entry of application number, name, classification number, keyword, etc. |
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| 8 | DPMA | DEPATIS searches for global patent publications. It is mainly to archive the electronic files of patent retrieval platform and then show the reclassified IPC in the search results | “IPC” tag search or browse international patent classification number system, keyword or symbol search IPC through rating page, or IPC through IPC index search IPC through IPC number | It covers nearly 90 million patent documents. You can use the patent number to search for successful retrieval information. |
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| 9 | CIPO | The database is provided by the Canadian Intellectual Property Office and contains patent documents since 1920. The classification of patent documents can be divided into two stages: The Canadian Patent Classification System (CPC) and then IPC (after October 1, 1989) | Basic query, patent number query, Boolean query, advanced query | Canada’s patent search results are very rich, including almost all patent information. When retrieving, the number of Canadian patents hit out of all patents will be displayed so that users know total number of native patents and list of patents retrieved. |
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