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"According to TUAW, Apple has gained two significant new patents today for iOS; slide-to-unlock and the keyboard effect of letters getting larger as you type.\r\n\r\nBoth of these effects have been staples of the iPhone/iOS software since the iPhone first hit the market, and slide-to-unlock especially is a feature that many people really like about iOS.\r\n\r\nApple applied for these patents three years ago, and has many other patents related to unique features of iOS. As far as these features showing up on other mobile operating systems, slide to unlock and larger keys have shown up in some Android phones and builds.\r\n\r\nHere are what we believe to be the two USPTO \u00A0patents  in question. However, due to a software error the images are unable to  be displayed. If you have any clarification, please let us know:\r\n\r\nPatent #s\u00A0D621,848 and\u00A0D621,849.\r\n\r\nUpdate: One commentor on the TUAW post mentioned that these design patents and as long as the functionality doesn't look like Apple's, other OS/developers may be able to still use the utility. According to Wikipedia, a design patent provides the following protection:\r\n&amp;quot;A US design patent covers the ornamental design for an object having practical utility. An object with a design that is substantially similar to the design claimed in a design patent cannot be made, used, copied or imported into the United States. The copy does not have to be exact for the patent to be infringed. It only has to be substantially similar.&amp;quot;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apple/2010/08/17/ios-slide-to-unlock-is-now-an-apple-patent/>