I am curious about this too.
Also because I was thinking about the current 3D Printing scene and how these problems could manifest themselves with a U.S.-based business infused with VC dollars.
Thinking out loud, this may be an equalizing factor in how MakerBot develops their technology contrasted to, say, the Ultimaker which prints faster and larger with seemingly finer detail. If the Ultimaker had the success that MakerBot is seeing, I would bet that they would be under much higher scrutiny and possible legal trouble. Today's and future MakerBots are no doubt designed with this in mind.
With so many patents floating around, I can see it as an immense challenge to truly innovate while being scrutinized by lawyers.
Ah well, I'm up for the challenge! ^__^
Though I am disheartened to think that if, and I'm speculating here, there was a MakerBot in the pipeline that met or exceeded the build size, layer thickness, precision, and dual-extruded dissolving support material, basically bests the current commercial equivalent; MakerBot would be under a legal firestorm regardless of whether they violated patents or not.