The US Patent & Trademark Office published a new patent application from Microsoft this week that reveals their ongoing work in the area of expandable mobile devices such as a smartphone or mini tablet. The intended goal is to design mobile devices with a flexible display that will be able to almost double in size when needed. The user will be able to expand the display by simply pulling it out of the smartphone's housing as noted in our cover graphic. Microsoft isn't alone in pursuing this kind of device, as a Samsung patent surfaced exactly a year ago this week illustrating the very same concept. Whether expandable mobile devices will ever be able to challenge dual LCD display smartphones, phablets and/or mini tablets is unknown at this time.