Ohio-based Impulse Technology is suing Microsoft for allegedly infringing on patents it holds for technology that tracks users' movements and lets them play games without a controller.
Impulse claims that Kinect infringes on seven of its patents covering a "wide variety of games where the movement of a player is tracked in three dimensions ... and certain exercise games where the motion of the player is tracked to effect movement of a virtual avatar, and the exertion of the user is monitored, including where the tracking of the player is done by use of a camera."
According to Patent Arcade, eight game makers - including EA, Sega, and Konami - are named as defendants in the suit too. They're also accused of making exercise games, sports titles and others that violate the patents.
Impulse is seeking a permanent injunction, damages, interest, attorneys' fees and costs.
In January Peter Klein, chief financial officer at Microsoft, labelled Kinect the "fastest-selling consumer electronics device in history".