Research on Technology Evolution in the Revised IPC Classification

Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》

Xu Jinglong Zhao Yajuan

Abstract： [Purpose/significance] This article attempts to study technological evolution from the perspective of patent classification revisions, and provides new ideas for technological evolution research. [Method/process] First, according to the 2009-2018 revisions of the H part of the IPC classification table, four types of revisions were summarized: new classification, deletion classification, intra-class transfer classification, and inter-class transfer classification. Secondly, for the archived documents generated after classification revision, a reclassification method of patent archived documents based on the Word2vec+TextCNN model was proposed, so that the old and new classification tables were connected by reclassifying patents. Finally, combined with the revised classification and reclassification patents of Part H from 2009 to 2018, the preliminary exploration of technological evolution was carried out. [Result/conclusion] The patent reclassification model can effectively solve the problem of archived documents, provides reference for patent reclassification work, and can link the new and old patent classification tables; based on IPC classification revision and reclassification of patents, the main technological evolution direction after classification revision can be analyzed, providing a new perspective for research on technological evolution.

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