Microsoft, EA, Ubisoft, THQ and several other defendants are the target of a patent lawsuit filed in Delaware on July 1, 2011 by Impulse Technology Ltd.   The asserted patents are: 6,308,565, 6,430,997, 6,749,432, 6,765,726, 6,876,496, 7,359,121 and 7,791,808.  The accused products are Kinect titles published by each of the defendants.  It appears that the patents were originally intended to protect an athletic training system.  A number of YouTube videos demonstrate the system in use.

Are motion-based mini-games and dancing now patent infringement?

A copy of the amended complaint may be found here.