File:Number of patent filings in fuel cells by the five key inventor locations.png

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Number of patent filings in fuel cells by the five key inventor locations.

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English: Japanese inventors contributed heavily to the first major surge in patent filings related to fuel cells (2000–2005) and Chinese inventors to the second (2016–2020).
Date
Source https://www.wipo.int/edocs/pubdocs/en/wipo-pub-1076-en-patent-landscape-report-hydrogen-fuel-cells-in-transportation.pdf
Author WIPO

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