This paper surveys the literature on university patenting. From the point of view of the economic theory of patents, it is argued that patenting knowledge developed by university researchers is paradoxical: patents are normally intended to stimulate knowledge development by providing property rights, but universities operate also under a different incentive scheme, i.e., they receive public funds to perform socially useful knowledge. In the debate surrounding the so-called Bayh-Dole Act in the United States, it has, however, been argued that patents on university inventions may be necessary to stimulate technology transfer from universities to private firms. The first part of the paper addresses two major questions. First, what is the econo...