The International Patent Classification in 2019 consisted of over 74,000 classification codes consisting of alphanumeric codes. The IPC is hierarchical in ... ... <看更多>
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The International Patent Classification in 2019 consisted of over 74,000 classification codes consisting of alphanumeric codes. The IPC is hierarchical in ... ... <看更多>
The Cooperative Patent Classification (CPC) is an extension of the IPC and is jointly managed by the EPO and the US Patent and Trademark ... ... <看更多>