Apple and Samsung are expected to broaden their battlefield soon, both in terms of patent suits and actual products. Apple could launch a small iPad this fall and then a second new iPhone in the spring, according to some reports, while Samsung is preparing the next Galaxy, the S IV, for early 2013. For now, of course, Samsung will find it hard to score profile points against the iPhone 5 launch, which is already shaping up to be the biggest ever for Apple ‘ but at the cost of increased subsidy bills for its carriers. In the patent war, both firms are trying to draw their rivals’ latest, and most lucrative, devices into the fray. As well as preparing an…