As state financial support for the University of Minnesota declines as a proportion of its total budget, the "U" is increasingly turning to other sources of income. One promising area of growth is licensing University patents to the private sector. But critics fear the drive for patent income unfairly subsidizes corporations and detracts from the University's larger research mission. As a part of our weeklong series, "Universal U", Minnesota Public Radio's Patty Marsicano looks at the economics of university patents: