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| A Comparative Study of Inventor Bibliographic-Patent- Coupling and Inventor-Patent-Classification-Coupling —Non-Practicing Entities as an Example |
| Song Yanhui1,2, Qiu Junping2 |
1.School of Management, Hangzhou Dianzi University, Hangzhou 310018
2.China Academy of Science and Education Evaluation, Hangzhou Dianzi University, Hangzhou 310018 |
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Abstract Patent literature, like other scientific papers, is an important scientific literature, and is significant in extensions of the method of bibliometrics to the measurement of patent literature. In this paper, non-practicing entities (NPE) patents are used as samples. Using frequency analysis, correlation analysis, factor analysis, visual analysis, and other methods, it compares the two analysis methods of Inventor Bibliographic-Patent-Coupling (IBPC) and Inventor Patent Classification-Coupling (IPCC) to explore the NPE patent structure. The results show that IBPC is correlated with IPCC. Furthermore, the results of factor analysis show that the coupling analysis of inventor's patent literature is better than that of inventor's classification. IBPC analysis can identify additional research topics. The core research fields of NPE patent discovered by IBPC and IPCC are digital computer, communication digital information transmission, and data storage and transmission, all of which can represent the structure of NPE patents. Therefore, the combination of the two will be more effective in probing and analyzing the subject structure, allowing even more valuable conclusions to be drawn.
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Received: 08 January 2020
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