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References to literature from the business sector in patent documents: a case study of charging technologies for electric vehicles

Author

Listed:
  • Zhao Qu

    (Humboldt-Universität Zu Berlin
    German Centre for Higher Education Research and Science Studies (DZHW))

  • Shanshan Zhang

    (Tangshan Normal University)

Abstract

Expansion of government R&D budgets on promoting electric vehicle (EV) adoption and charging infrastructure development is likely to continue to be a key component of ecological innovation policies. Using an original data set of non-patent literature (NPL) references extracted from patent documents pertaining to EV charging technologies, this paper provides new evidence on the flows of knowledge with or without a scientific contribution from the business sector. Three main questions are addressed in this paper for exploring whether different patterns of knowledge flows emerge between contributions involving academics and or the business sector not only contributes towards a better understanding of the interrelations between scientific and technological fields regarding EV charging but also serves the purpose of fostering more partnerships and unlocking further investments in research. First, what information facilitates knowledge flow from science to technology? NPL references with authors from the business sector have received a lower number of patent citations on average, and universities still occupy the primary locus of knowledge production. However, patents citing firm publications have a particular focus on technologies relating to stations and rail vehicles and have a broader scope, a larger family size, more claims and forward citations compared to others on average. Second, are there any differences between the types of author contributions? Firms’ collaborations with academia in NPL references contribute to an even higher index, while the patents published between 2001 and 2005 with citations to collaborative scholarly works from the business sector have been cited less than the others. Finally, how are non-patent citations relevant to assignments of patents and patent applications, as well as other events that affect title or patent ownership? Patents citing firm publications in general have fewer assignments, but more on average and patents citing collaborative works are more likely to be changed in titles or ownerships. The role of firm publication needs to be further explored in a border technological field considering its specific relevance both to generating applied technologies and technology transfer as indicated by EV charging patents.

Suggested Citation

  • Zhao Qu & Shanshan Zhang, 2020. "References to literature from the business sector in patent documents: a case study of charging technologies for electric vehicles," Scientometrics, Springer;Akadémiai Kiadó, vol. 124(2), pages 867-886, August.
    • Handle: RePEc:spr:scient:v:124:y:2020:i:2:d:10.1007_s11192-020-03518-1
    DOI: 10.1007/s11192-020-03518-1
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