I actually think Immersion just owns the patent to one kind of force feedback motor. I believe it's the kind with two motors side by side and probably other various features. These are the motors used by Sony and Microsoft. Nintendo has their own rumble feature (probably developed when they created the Rumble Pak for N64), so they are exempt from this lawsuit.
Also, if I remember correctly, MS and Sony were sued at the same time, but MS opted to settle out of court. They paid the company like $20 million or something and bought some of their stock or something like that. Sony opted to go to court and this is the result.