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This paper explores the characteristics of 238 patents on 94 "Inventions" contributed by major multinational innovators to the "Eco-Patent Commons", which provides royalty-free access to third parties to patented climate change related innovations. By comparing the pledged patents to other patents in the same technologies or held by the same multinationals, the authors investigate the motives of the contributing firms as well as the potential for such commons to encourage innovation and diffusion of climate change related technologies.
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