DrumMania and Guitar Freaks publisher Konami today filed suit against Harmonix parent company Viacom over patent violations related to Harmonix's rhythm title Rock Band.

Konami claims that the company's patent for a "musical-rhythm matching game," filed in the United States circa 1999, predates and supersedes Harmonix's 2007 patent filing for a "game controller simulating a musical instrument."

According to Bloomberg, Konami seeks cash compensation and an order to block the use of Harmonix's inventions. Viacom is waiting to receive the complaint before responding to the allegations.

Konami released the Japanese rhythm arcade games DrumMania and Guitar Freaks in 1999, with Guitar Freaks being initially ported to the United States later that year. The company is now planning to release its own Rock Band-style game titled Rock Revolution.