The US Patent & Trademark Office has published a patent application from Apple that reveals one of the next chapters for Apple's iPhone. According to Apple's documentation, a future iPhone could actually sport a display on each side of the device so as to advance the richness of reading an e-book or e-magazine. In April of this year Apple revealed a hybrid e-paper and LCD display for a future iPhone and today Apple explains how a user will be able to use such a display with a new flip action mapping system. The mapping system will provide a reader with options that will easily enable them to take notes about what they're reading or view a full dictionary definition or even find related reading materials depending on which direction that they flip their iPhone. This future iPhone will also be able to be turned into unique image viewer. While this is definitely a futuristic design, we're at least getting a peek into the intial phases of Apple's research in finding the ultimate reading application for future mobile devices.