Japanese publisher Konami has sued Rock Band developer Harmonix over alleged patent infringements with its range of rhythm action games and associated controllers. Konami's long-running Guitar Freaks and DrumMania series of titles feature similar gameplay to Rock Band and also use musical instrument shaped controllers. Konami also publishes a range of karaoke themed games, including the Karaoke Revolution series on consoles, which Harmonix has worked on in the past. Harmonix's first game to feature a ... ...