Brandywine filed suit against Letternine Internet Access Company and Loretto Communication Services alleging that the defendants’ DSL service and equipment infringes six patents related to DSL and modem based communications (5,206,854; 5,251,328; 5,812,537; 5,828,657; 6,970,501; 7,894,472).  Just two weeks prior, Brandywine filed similar suits against over 50 ISP’s with the same patents.  Brandywine currently has over 65 active cases, including a declaratory judgment against Brandywine filed on January 10 by medical device company Estech.  The patents-in-suit were assigned to Brandywine by Rembrandt IP in 2010 and were part of a portfolio of patents from AT&T/Lucent spinout/DSL chip provider Paradyne that Rembrandt IP acquired in 2006 from Paradyne acquirer, Zhone.  RPX reviewed the patents as an open market opportunity (Rembrandt_DSL-Acq) in February 2010.  1/14, Northern District of Ohio, assigned to Judge Jeffrey J. Helmick, 3:2013cv00093; 1/15, Middle District of Tennessee, assigned to Chief Judge William J. Haynes Jr., 1:2013cv00004.