Uniloc USA, Inc. and Uniloc Luxembourg S.A. have added Snapchat (2:16-cv-00696) and Tencent (2:16-cv-00694) to a litigation campaign, begun approximately two weeks ago, targeting smartphone messaging apps. Each new complaint asserts four patents (7,535,890; 8,199,747; 8,724,622; 8,995,433) generally related to group voice messaging. Defendants already hit by the campaign include Apple, BlackBerry, Facebook (WhatsApp), and Samsung.