Sampo IP’s campaign has more than doubled after its recent filings against Amazon, eBay, Facebook, Intuit, and LinkedIn. The subsidiary of Marathon Patent Group (MPG) is asserting the same three patents used in its previous litigation that relate to facilitating communication and collaboration over a network between members of a group (6,161,149, 6,772,229, 8,015,495). All three patents originated with GroupServe and were transferred to LVL Patent Group in June 2012. Sampo acquired the patents from LVL, an entity controlled by IPNav, in March 2013, the same month that it began asserting the patents in litigation. The majority of the patents owned by MPG and its subsidiaries have come from IPNav companies, which is likely related to the “strategic partnership” between the entities. The complaints state that defendants all provide messaging systems that allow users to interact and allege that those services infringe the patents-in-suit. Two of the cases, those against eBay and LinkedIn, only assert the ‘229 and ‘495 patents but the allegations are similar to the other cases in the campaign. 2/7, District of Delaware, 1:14cv00171, 1:14cv00172, 1:14cv00173, 1:14cv00174, 1:14cv00175