Target Technology, a company that manufactures and sells thin film alloys for optical discs, has sued Sony in the US District Court for the Southern District of Indiana for violating a patent it holds on reflective layers used in optical storage media. The patent in question, no. 7,018,696, was filed in April 2004 and issued in March 2006.
Sony is a true lawsuit magnet. Of course, Target Technology doesn’t specify exactly what the patent Sony is infringing on, but claim that every single Blu-ray disc released is guilty.
Source: Ars Technica