Optical Memory Storage [NPE] filed suit against Fujifilm, HP, Imation, Panasonic, Philips, and Wal-Mart. Complaint is currently unavailable.  OMS has filed three previous suits over patents related to CD and Blu-ray discs.  OMS is a subsidiary of Acacia Technologies and the holder of patents assigned by Energy Conversion Devices in 2010.  7/19, Eastern District of Michigan, 2:2011cv13110.