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Measuring innovation in energy technologies: green patents as captured by WIPO's IPC green inventory

Author

Listed:
  • Lorena Rivera Leon
  • Kyle Bergquist
  • Sacha Wunsch-Vincent
  • Kunihiko Fushimi

Abstract

We analyze inventions in green energy technologies over the period 2005-2017. We use a novel dataset, making use of the IPC Green Inventory of the World Intellectual Property Organization (WIPO) to analyze four broad categories of green energy technologies including alternative energy production technologies, energy conservation technologies, and green transportation. We use these data to look at how patent families and PCT international patent applications have evolved in this field in recent years. We find that energy innovation-related patenting has first expanded exponentially up until 2013, both in terms of the total number of patent families and PCT international patent applications in green energy technologies. Yet this period of accelerated growth in the number of published green energy patents has been followed by a period of deceleration—even a slow decline. Although most green energy technologies have seen a downward trend in the annual number of patents published since 2012, the decline has been most pronounced in nuclear power generation technologies and alternative energy production technologies. The latter notably include renewable energy technologies, such as solar and wind energy, and fuel cells. In contrast, patents in energy conservation technologies and green transportation technologies have continued to grow, but at a slower pace.

Suggested Citation

  • Lorena Rivera Leon & Kyle Bergquist & Sacha Wunsch-Vincent & Kunihiko Fushimi, 2018. "Measuring innovation in energy technologies: green patents as captured by WIPO's IPC green inventory," WIPO Economic Research Working Papers 44, World Intellectual Property Organization - Economics and Statistics Division.
    • Handle: RePEc:wip:wpaper:44
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    File URL: https://www.wipo.int/edocs/pubdocs/en/wipo_pub_econstat_wp_44.pdf
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    References listed on IDEAS

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    1. de la Tour, Arnaud & Glachant, Matthieu & Ménière, Yann, 2011. "Innovation and international technology transfer: The case of the Chinese photovoltaic industry," Energy Policy, Elsevier, vol. 39(2), pages 761-770, February.
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    Cited by:

    1. Block, Jörn & Lambrecht, Darius & Willeke, Tom & Cucculelli, Marco & Meloni, Damiano, 2025. "Green patents and green trademarks as indicators of green innovation," Research Policy, Elsevier, vol. 54(1).
    2. Liu, Xueyue & Liu, Yu & Zhao, Ruili, 2023. "Import competition and energy efficiency: Firms' responses to the WTO accession in China," Journal of Economic Behavior & Organization, Elsevier, vol. 214(C), pages 670-690.

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    More about this item

    Keywords

    Innovation; Intellectual Property; Patents; Energy; Green innovation; Green energy technology; Sustainable development;
    All these keywords.

    JEL classification:

    • O33 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Technological Change: Choices and Consequences; Diffusion Processes
    • O34 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Intellectual Property and Intellectual Capital
    • Q01 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - General - - - Sustainable Development
    • Q55 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environmental Economics: Technological Innovation

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