On May 01, the US Patent & Trademark Office published a patent application from Apple that reveals possible future CarPlay user interface features. One such feature is a simple buy button allowing the passenger of the car to make a quick purchase of a tune heard on the radio. Although Apple doesn't mention it, I'm sure that they're working on a "Siri" voice command equivalent that wouldn't be distracting to the driver. Last week we learned that Apple invented a technology likely aimed at Carplay that will not allow a driver to text while their vehicle is running. REPORT UPDATED 8:45 PST: The report now extends to five Apple patents covering CarPlay and iTunes Radio.