Blizzard sued for patent infringement over WoW, CoD

thunderdanp writes: Worlds Inc. filed a patent infringement lawsuit against Activision Blizzard, Inc., Blizzard Entertainment, Inc. and Activision Publishing, Inc. in the United States District Court for the District of Massachusetts on March 30, 2012. Activision's World of Warcraft(R) and Call of Duty(R) video games have been identified in the complaint as infringing on Worlds' patents.

It appears these patents claim priority back to 1995, so invalidating these patents could be difficult, giving how much prior art might be excluded.