20140277847 | ACCESSORY ROBOT FOR MOBILE DEVICE - A robot controllable by a portable device, the robot including a head configured to removably retain the portable device, a support removably mounted to the head, and a base mounted to the support, the base including a first wheel coaxially aligned with a second wheel and a balancing mechanism configured to maintain the head within a predetermined range of angular positions relative to a gravity vector based on instructions received from the portable device. | 09-18-2014 |