Landmark Technology [NPE] filed suit against ten retail product manufacturers over three patents related to e-commerce transactions. Landmark Technology has filed six prior suits with the same patents against 54 defendants since 2005.  The web sites operated by the defendants and their use of electronic data interchange systems used for order processing  and transaction managment are identified as the accused products in the complaint. 6/21, Eastern District of Texas, 6:2011cv00322.