Marketsource filed an action for declaratory judgment against Webvention Holdings [NPE] over a patent related to hover previewing and dynamic search.  On its website, Webvention claims to have licensed the patent-in-suit to over 325 companies, and has been named in more than 25 separate declaratory judgment actions since September 2010.  Webvention obtained the patent-in-suit in November 2009 when it merged with Ferrara Ethereal, a patent-holding company owned by Intellectual Ventures. The complaint states that Marketsource received a letter from Webvention saying, “For the next 45 days, Webvention is willing to license the ‘294 patent for a one-time, fully paid-up licensing fee of $80,000.” 12/6, District of Delaware, 1:2011cv01204.