Could patent wars hinder innovation?
9 November 2011 Last updated at 11:48 GMT
Is the patent system a vital part of innovation infrastructure or is it a hindrance?
The BBC's technology correspondent Rory Cellan-Jones asks whether it is the only way that inventors can be certain that their ideas can be protected from thieves, or if it is tying innovators in knots.
Broadcast on Tuesday 8 November 2011.