Oracle filed an action for declaratory judgment against Oasis Research over six patents related to online back-up systems and remote storage.  Oracle says it received a notice letter from Oasis in May 2011.  Oasis Research is the assignee of  six patents that were assigned by Kwon Holdings Group a.k.a. Enhanced Software to Intellectual Ventures in July 2010, then to Oasis three days later.  Oasis Research filed its first patent suit in August 2010 against more than 15 defendants including AT&T, Iomega, and Rackspace.  8/2, District of Delaware, 1:2011cv00679.