# How Touchscreens Show and Snap Back When You Scroll Past an Edge > Apple's 2008 patent describes how a touchscreen device displays a blank area when a user scrolls past the edge of a document, then smoothly snaps the document back into place when the user lifts their finger. - **Patent:** US 7469381 - **Original title:** List scrolling and document translation, scaling, and rotation on a touch-screen display - **Owner:** Apple Inc - **Granted:** 2008 - **Status:** Active - **Times cited:** 402 - **Field:** consumer_electronics, software, telecommunications ## What it does This patent describes a method for scrolling content on a touchscreen device. When a user moves an object, like a finger, on the screen (as per claim 3 and 4), an electronic document (like a web page or image, per claims 6-8) scrolls in that direction. If the user keeps scrolling past the document's actual edge while their finger is still touching, the device displays an empty area beyond that edge (claim 1). For example, if you scroll to the very top of a photo album and keep pulling down, you'll see a gray space appear above the first photo. Once the user lifts their finger, the document automatically translates back in the opposite direction until the empty area is no longer visible, creating an elastic 'bounce' effect (claim 1 and 16). ## What it does NOT cover - Does not cover scrolling that simply stops abruptly at the edge of a document without showing any area beyond the edge. - Does not cover scrolling mechanisms that do not involve a touch screen display, such as using a mouse wheel or keyboard arrows. - Does not cover scrolling where the document remains stretched or displaced after the user lifts their finger, as it specifically requires translating back until the area beyond the edge is no longer displayed. - Does not cover scrolling that involves changing the magnification (zooming) or rotation of the document, as the claims focus on translation and specify 'same magnification' (claim 2). ## The clever bit The novelty lies in the specific interaction sequence: detecting an object at the edge, displaying an area beyond the document's boundary while the object is still present, and then, crucially, translating the document back to hide that area once the object is removed, simulating an elastic attachment. ## Real-world examples 1. Apple iOS (iPhone, iPad) scrolling behavior 2. Many Android smartphone and tablet scrolling interfaces 3. Web browsers on touch devices when scrolling to the top or bottom of a page 4. Photo gallery applications on touch devices ## Why it matters This patent describes a fundamental interaction design element that became a hallmark of early iPhone and iPad user interfaces. The 'rubber-banding' or 'bounce' scroll effect provided a clear visual cue that a user had reached the end of scrollable content, making touch interfaces feel more responsive and intuitive. This interaction quickly became expected behavior across many mobile operating systems and applications. ## Frequently asked questions ### What does How Touchscreens Show and Snap Back When You Scroll Past an Edge cover? Apple's 2008 patent describes how a touchscreen device displays a blank area when a user scrolls past the edge of a document, then smoothly snaps the document back into place when the user lifts their finger. ### Who owns patent US 7469381? Apple Inc owns this patent, granted in 2008. ### When does this patent expire? This patent is expected to expire on December 14, 2027, when the invention enters the public domain. ### What is patent US 7469381 cited by? This patent has been cited by 402 later patents that build on its ideas. ### What problem does this patent solve? This patent describes a fundamental interaction design element that became a hallmark of early iPhone and iPad user interfaces. The 'rubber-banding' or 'bounce' scroll effect provided a clear visual cue that a user had reached the end of scrollable content, making touch interfaces feel more responsive and intuitive. This interaction quickly became expected behavior across many mobile operating systems and applications. ### What does this patent NOT cover? Does not cover scrolling that simply stops abruptly at the edge of a document without showing any area beyond the edge. **Full plain-English explainer:** https://patentbrief.org/patent/us/7469381/iphone-rubberbanding **Original patent:** https://patents.google.com/patent/US7469381 --- _Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._ ## Related patents Semantically similar inventions in the PatentBrief corpus: - [How Touchscreens Handle Scrolling and Rubber-Band Effects](https://patentbrief.org/patent/us/7844915/application-programming-interfaces-for-scrolling-operations) — This patent describes the software logic that allows touchscreens to distinguish between simple scrolling and multi-finger gestures, while also enabling the signature 'rubber-band' bounce effect when you reach the end of a page. - [How Smartphones Switch Between Slow and Fast Scrolling](https://patentbrief.org/patent/us/8683378/scrolling-techniques-for-user-interfaces) — A system that automatically changes how a list scrolls based on how fast or hard you interact with the screen. - [How Touchscreens Understand Your Finger Swipes and Scrolls](https://patentbrief.org/patent/us/7479949/iphone-multi-touch) — This patent describes how touchscreens use smart rules, called heuristics, to figure out if your finger movement means scrolling up, moving around a map, or flipping to the next photo, especially by looking at how you start your swipe. - [How Pull-to-Refresh Works on Your Smartphone](https://patentbrief.org/patent/us/8448084/pull-to-refresh-gesture) — This patent describes the 'pull-to-refresh' gesture that lets users update a list of content, like a social media feed, by dragging down until a trigger appears and then releasing. - [How the iPhone's Slide-to-Unlock Gesture Works](https://patentbrief.org/patent/us/7657849/slide-to-unlock) — Apple's 2010 patent describes unlocking a device by dragging a specific graphical image across the touchscreen along a predefined path, a gesture that became iconic with the original iPhone.