Patent ID: 8692815

Claim:
An apparatus comprising: a touch sensor providing a touch-sensitive surface enabling the position of a tip of a digit of a user to be recurringly determined as the user moves the tip across the touch-sensitive surface while keeping the tip in contact with the touch-sensitive surface, and able to detect an increase in pressure exerted against the touch-sensitive surface through the tip to make a selection; a processing device; and a storage accessible to the processing device and storing a sequence of instructions that when executed by the processing device, causes the processing device to: take a set of measurements from the touch sensor indicative of the position of the tip on a recurring basis; maintain a predetermined quantity of the most recently taken sets of measurements indicative of the position of the tip in the storage; and in response to receiving an indication of an increase in pressure exerted against the touch-sensitive surface through the tip being detected: access one of the sets of measurements indicative of the position of the tip taken at a predetermined amount of time into the past; and employ the one of the sets of measurements to determine a position of the tip at a time prior to the increase in pressure being exerted against the touch-sensitive surface.