Patents are the currency of the realm these days, and companies accrue them however they can -- whether filing for their own or buying someone else's. Microsoft's no stranger to the patent game, and it's added one more piece to its IP stockpile in the form of a "moveable housing of a mobile communications device." A broad title, to be sure, but the patent essentially covers sliders where the keyboard ends up flush with the screen after it's moved. In existing designs, the sliding display ge