Stephen O. Lemay

How the iPhone's Slide-to-Unlock Gesture Worked

Apple's 2010 patent on unlocking a device by dragging a specific graphical image along a predefined path on a touchscreen, a gesture iconic with early iPhones.

How Touchscreens Tell the Difference Between Your Finger Gestures

Apple's 2009 patent describes how a touchscreen device uses clever rules, called heuristics, to figure out whether your finger movement means you want to scroll, pan, or switch items, often by looking at the very start of your touch.

Unlocking a device by performing gestures on an unlock image