This CGD Policy Paper focuses on invented or created technologies of the type that could (theoretically) be subject to patents and the potential for international agreements including the Addis Financing Conference to better create and share such technologies. It discusses the nature of invented technologies and the standard policy tools used to support its development. It then addresses two separate questions related to inventions and development: ‘what is invented’ and ‘how it diffuses.’ With this background, it goes on to discuss the role of policy tools including patents, tiered pricing, research support, advance market commitments, and prizes in creating development-friendly technology. It concludes with some recommendations for language to be inserted in the Addis Declaration