Patent 8698736 was granted and assigned to Immersion Corporation on April, 2014 by the United States Patent and Trademark Office.
A handheld computer interface includes an enclosure, a mass coupled to the enclosure, and an actuator coupled to the mass to change a position of the mass relative to the enclosure. When the actuator receives a signal indicating a change in the center of mass of the interface, it changes the position of the mass.