Here's the first result from Google: http://www.cmu.edu/patent-lawsuit/ CMU vs Marvell.

Here's an article from Stanford law school: 'Are universities the new patent trolls?' http://papers.ssrn.com/sol3/papers.cfm?abstract_id=980776

Universities often (and unfairly IMHO) claim rights on graduate research precisely to monetize and act as patent gatekeepers.