The Community Patent Project aims to design and pilot an online system for peer review of patents. The Community Patent system will support a network of experts to advise the Patent Office on prior art as well as to assist with patentability determinations. By using social software, such as social reputation, collaborative filtering and information visualization tools, we can apply the “wisdom of the crowd” – or, more accurately the wisdom of the experts – to complex social and scientific problems. This could make it easier to protect the inventor’s investment while safeguarding the marketplace of ideas.