 The patent for an Absolute position controller, US 4,814,533, is the earliest known reference to this type of input device.However, it was the patent for an orientational mouse computer input system, US 5,162,781, which suggested using a tablet with a detectable pattern or grid and sensors in the puck for computer navigation.The Wacom Intuos 4D Mouse puck was the first commercial rotating “mouse.” The product was not a standalone mouse but rather a tablet accessory.