Patent ID: 7843428

Claim:
A handheld electronic communication device, comprising: a device body having a display screen located above a four-wheeled user input device located on a front face of the body, said four-wheeled user input device comprising a set of four rotatable wheels, each mounted on an axle having a longitudinal axis oriented substantially perpendicular relative the front face of the body and said axles being arranged in a substantially square pattern in a plan view toward the front face of the body; at least one sensor operatively associated with the set of four wheels, said at least one sensor configured to sense motion induced in any of said four wheels and said at least one sensor further configured to output electronic data representative of sensed wheel motion; and a microprocessor communicatively interposed between the at least one sensor and the display screen and programmed to receive the output electronic data from the at least one sensor as input data and to process said input data into cursor guidance instructions that are outputted to the display screen and which affect at least one of x-direction and y-direction cursor movement on the display screen in correspondence with the sensed wheel motion.