This morning’s Observer column about Richard Posner’s landmark ruling.

What brings Posner to mind this Sunday morning, however, is not his views on obesity but on intellectual property. You may have noticed that in the last few years the world’s biggest technology companies have become lavish patrons of the legal profession. Apple, Google, Samsung, HTC, Microsoft, Oracle, HP, Amazon and others have being suing one another in courts around the globe, alleging that they are infringing one another’s patents. The resulting bonanza for lawyers has long passed the point of insanity, but up to now the world’s courts seem powerless to make the litigants see sense. As a result, judges find themselves allocated the role of pawns in what are effectively business negotiations between global companies.

Until now. What happened is that Posner, in an unusual move, got himself assigned to a lower court to hear a case in which Apple was suing Google (which had purchased Motorola in order to get its hands on the phone company’s patent portfolio) over alleged infringement of Apple’s smartphone patents. Posner listened to the lawyers and then threw out the case. But what was really dramatic was the way he eviscerated the legal submissions. At one point, for example, Apple claimed that Google was infringing one of its patents on the process of unlocking a phone by swiping the screen. “Apple’s argument that a tap is a zero-length swipe,” said Posner, “is silly. It’s like saying that a point is a zero-length line.”