Last December, when Nathan Myhrvold’s ginormous patent-aggregator Intellectual Ventures filed its first three patent infringement suits, it seemed as though a dam had broken. Between the time IV was founded in 2000 until last December, the company had spent hundreds of millions of dollars to acquire some 30,000 patents — but it had never filed a suit to enforce them. IV instead relied on the leverage of its vast portfolio to make licensing deals. The tech world wondered whether the December infringement suits were the first trickles of what would become a river of litigation.