Climate change is a pressing issue confronting the global community. The rapid development and diffusion of clean technologies (i.e., technologies necessary for adapting to or mitigating climate change) must be a central part of the solution. However, a stalemate has persisted in global climate change negotiations at the United Nations, caused by diverging views regarding the role of intellectual property rights “IPR” in the international transfer of clean technologies. Developed nations insist on strong IPR for clean technologies, while developing nations claim that IPR is a major barrier to the international transfer of clean technologies and demand to remove or reduce IPR for clean technologies. This article explores two questions: (1) Is the existence of IPR a major barrier to the international transfer of clean technologies, and (2) why has the international transfer of clean technologies to developing nations been limited? Analyzing evidential data available, this article concludes that IPR probably has not been a major barrier to the international transfer of clean technologies. However, sustainable international transfer of clean technologies requires the joint efforts of developing and developed nations. To prepare for sustainable international transfer of clean technologies and to advance the effort for addressing climate change, this article proposes a new paradigm based on domestic innovation, international aid and international technology collaboration.