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. 2010 Aug 16;5(8):e12203. doi: 10.1371/journal.pone.0012203

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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The blue, green, and red lines show the number of triadic patents granted per capita to American (US), European (within the EU-27), and Chinese inventors, respectively. Per capita figures were divided by the population of the region.